Thor eating the Poptarts because he hasn’t been to this realm in a while and maybe this is a delicacy and they are honoring him, or maybe they are poor and this is all they have to share and he is, above all things, polite to his hosts.
Thor being much happier when he gets to the diner and gets scrambled eggs because protein and do you know how much protein it takes to support that much muscle mass?
Thor tinkering with Darcy’s tazer to increase the power output after watching Star Trek episodes with Steve because her tazer only has a stun option and he wants to make sure that, if necessary, it has a kill option as well. She has shown herself to be a worthy warrior and will not abuse this power.
Thor bringing Asgardian therapists skilled in advanced PTSD treatment to Avengers Tower and locking Clint and Bucky and Steve and Natasha and Sam and Tony and whoever else is in arms reach in sessions with them. He never does it to Pepper though until she asks if it would be all right if she talked to someone for a while, and he apologizes and says “Of course.”
Thor volunteering as a sparring partner for Steve because as useful as a punching bag is, sometimes you want to hit someone, and no one else can stand up to Steve at full strength.
Thor going with Steve to visit the graves of all the Howling Commandos because he knows what it is like to lose friends and feel like it is your fault you weren’t there to protect them.
Thor getting Jarvis to set up an appointment with Tony’s tailor for him and coming back with a whole new bespoke wardrobe of suits. Jaws drop when he walks in to the main tower and he nods. That is the appropriate reaction to a Prince of Asgard entering the room.
Thor going to department stores and asking the sales girls to help him pick out a casual wardrobe because he knows that girls like touching his chest and he needs some t-shirts and jeans for when Tony has found another weird restaurant that they all have to go try. He’s perfectly capable of finding the right size by himself, but this way he has brightened some strangers’ days. Sometimes he gets Steve and Clint to come along and they get the most impeccable customer service.
Thor always buying a new outfit for Dr. Banner on these trips because he refuses to come along because he doesn’t like being touched but regularly needs new clothes.
Thor doing every Vine trend that comes along. Thor creating a few Vine trends, including one known as “The Hammer” and another known as “bilgesniping.”
Thor doing advocacy work for organizations that provide support to adopted kids.
Thor talking to Lady Sif at Natasha’s request about going on a date with Steve. Lady Sif punches Thor. So does Steve.
Thor giving the specifications for advanced vaccines against common diseases to Pepper so she can have her scientists at Stark Enterprises “discover” them.