I just saw this film earlier this evening. It was MASSIVELY fun! Great plot, a wonderful character in Baymax, and I loved the design of the various technologies used in the film. It's amazing to see how many successful films are being now adapted from Marvel Comics, even ones that the public many never have previously heard of, or even know are based on a Marvel comic. It's also not surprising to see John Lasseter's name in the credits, given his history with Pixar. I highly recommend this film.

---NITS & NOTES
I understand Tadashi wanted to give Baymax a look that was non-threatening and "huggable", but was it really a good idea to make him so rotund that he had trouble negotiating his way around common pieces of furniture? Would this really make Baymax an good medical robot, given the surgical beds and other equipment that he’d have to move around rapidly in the types of emergency medical situations that he was designed to be in?

Similarly, why didn't Tadashi create Baymax's skin with something a bit more tear-resistant? Remember, this is a robot designed to be a medic. If it eventually found itself in hospitals and similar areas of medical emergency, it would’ve been around surgical scalpels, scissors used to cut clothing off of patients, shrapnel, needles, and all sorts of things that could tear it up. Given that Tadashi had access to super high-tech materials to create Baymax, like the carbon nanotubes he used to create his endoskeleton, it seems odd he couldn’t do better than something that would need to be patched up with scotch tape. Since the film’s plot never requires Baymax to be torn up, why not say that his skin was made of polyethylene plastic, thermoplastic elastomer, synthesized spider silk, or something?

It sure is convenient that during Kabuki Guy’s first chase of Baymax and Hiro through the streets of San Fransokyo, the city is apparently deserted completely of citizens that could serve as witnesses of Kabuki Guy, and provide Hiro with the sort of credibility that he lacked when first reporting Kabuki Guy to that cop.

When Hiro nearly walks off the pier while pursuing his microbots, Baymax grabs him at the last moment, and says that it is advisable to wait an hour after eating before going swimming. Actually, this is a myth.

Why didn’t Hiro create more nanoprobes to combat the ones that Kabuki Guy stole? And if no longer had access to the equipment used to make them by that point in the film, then why didn’t he at least create a jamming device to disable the trasmitter headband used by Kabuki Guy to control them? Or another headband to interfere with Kabuki Guy's?

Did everyone else notice Stan Lee in one of the portraits hanging on that one wall in Fred's home? I didn't notice who the woman sitting next to Stan was, though. Did anyone get a good look at her and see if she was someone in-joke worthy?

If Hiro had the ability to scan Baymax to create a suit of powered armor for him, why couldn't he just create one for himself, instead of just piggybacking onto Baymax? Hell, he could’ve at least have given himself a parachute, but instead relies on Baymax to keep him from falling to his death.

Similarly, the first green suit of armor that Hiro creates for Baymax fits him just fine, but the second red one requires Hiro to stuff Baymax into it. Why is this? If Hiro's scanner has the ability to create suits that fit Baymax precisely, then why didn’t the second one do so?

After gaining the ability to fly, Baymax gradually improves his ability to navigate to the point where he is able to adeptly fly his why around bridges, buildings, aerial debris, etc. So why at the end, when he and Hiro are in Spoiler Warning! Highlight to read!that hyperspace dimension rescuing Abigail, does Hiro need to give Baymax directions like “Left!” “Up!”, etc.?

So why did Kabuki Guy wear a kabuki mask, particularly when Hiro and Baymax first confronted him in that warehouse, when Kabuki Guy presumably though no one was going to disturb him?

Here's another one I hadn't thought of at the time I saw the film:
Spoiler Warning! Highlight to read!
When Tadashi first introduces Hiro to Professor Callaghan, and Callaghan sees Hiro's microbots, why doesn't he just ask Hiro if he can borrow them to recreate the portal to rescue his daughter??? He's obviously on good terms with Tadashi and his other students, and I'm sure Hiro would be sympathetic to Callaghan's situation if he explained it to him. But instead he starts a fire that kills Tadashi, and could've killed countless others, and steals the microbots. Why is this?

I saw this again this evening.

Given how potentially dangerous (and valuable) the microbots are, and the fact that Hiro apparently left them in those crates at the science expo, why didn't he at least make sure to take the neurotransmitter headband that controls them with him when he left the expo? Remember this kid is a criminal who participates in illegal bot fights. Is he really so lacking in saavy that he never thinks someone might steal his stuff?

Throughout the film we see Baymax grab Hiro when he sees that he's about to be hurt. But when first activated, Hiro falls and exclaims in pain. Even though Baymax sees that a dislodged shelf is causing a row of objects on it to fall on Hiro, he makes no effort to block them or pull Hiro up.

After Baymax takes the lone microbot that Hiro has and goes out to see where it is trying to get to, Hiro goes after him and calls for him to stop, but Baymax doesn't stop. Why is this?

When returning from their discovery of Kabuki Guy's warehouse, Hiro tries to hide Baymax from Aunt Kass. Why is this? Kass knows what Tadashi did professionally. She had to know that he created robots. And even if she didn't, why couldn't Hiro just tell her that Baymax was created by Tadashi?

At one point, Hiro engages in hyperbole in telling him that he is having a heart attack. In response, Baymax activates the defibrilators in his hands and nearly shocks Hiro. Wouldn't Baymax scan Hiro first before doing this to confirm the status of his heart, as he always done when examining a patient throughout the film? (Of course, if he did that, then we wouldn't have the cute defibrilator moment.)

When Big Hero 6 first confronts Kabuki Guy as a team (Hiro's second encounter with him), Kabuki Guy sends his microbots to surround Wasabi's car. Why don't they immediately enclose the car and lift it off the ground to immobilize it? Instead, they allow the card to tunnel through it to an opening that the 'bots only close at the last second, and the car (driven by GoGo) just blasts through it.

Once the team has been upgraded with their personal technologies at Fred's place, the armored Baymax sees a butterfly and goes after it. Why does he do this?

Fred is the one who comes up with the theory that Krei is Kabuki Guy. But the team then decides that scanning San Fransokyo to find a match with Baymax's scan of Kabuki Guy during his previous encounters with him would be too time-consuming, at least until Baymax's sensor is upgraded to scan the entire city. But wouldn't it make more sense to test their theory by simply going to see Krei and having Baymax scan him to see if their theory is correct, and then scanning the city to look for Kabuki Guy once Krei is eliminated as a suspect? (Of course, if they did that, the audience would clue into the fact that it was Callaghan more quickly.)

Why in the world do Hiro and Baymax destroy Kabuki's mask with the neurotransmitter inside it? Isn't that the transmitter that Hiro created to control his stolen microbots? Doesn't he intend to take his stolen property back? Doesn't he need the transmitter to do so?

Okay, so the portrait WAS Stan Lee, and I learned that there was an easter egg ending going into this in more detail.

When Baymax takes Hiro's lone microbot and uses it to track the other microbots across San Fransokyo, why do none of the pedestrians react to Baymax? Are robots that common? If so, I don't recall seeing any walking around.

When first discovering Kabuki Guy's warehouse, Baymax startles Hiro, and Hiro tells him that he gave him a heart attack. Baymax takes this literally, and prepares to defibrilate Hiro with his defibrilator hands. Shouldn't Baymax have scanned Hiro first when he said this?

NANJAO: The writers of this film had to have been Stargate SG-1 fans.

The microbots are very much like the Replicators (albeit non-self willed), and the teleporters look exactly like the Stargate.