Fortunately, both fit and chubby work just fine for me, so I'm good either way. :3 Although he definitely did look amazing in Guardians... Hmm...
But seriously though, I definitely do kinda have to respect actors that are willing to go back and forth like that and lose and gain weight again for their various roles. I mean, I assume it's basically just another part of the job of an actor and I assume most of them don't really think that much of it, but I was actually able to be arsed to put in the effort to get fit and get a six-pack and all that, I know I wouldn't want to give it up that easily, especially since I would be more healthy and have more energy and all that, so I dunno, that it seems to just kinda roll off him and he takes in stride and has fun with it is kinda awesome to me I guess.