Even people that know what they're doing often end up looking ridiculous in dunks. Works with sweatpants though. Warning: Spoiler! (Click to show)
mpc60 goes so freaking hard and it's because everything about him comes together to work with that. like his body size/shape, his buzzed hair, and of course the enviroment in his photos always seems to help. He has a great sense of proportion and context, which GN absolutely lacks. (by context I don't mean environment, I mean context of the pieces)
GN just looks like a goomba in the bad kind of white trash clothes with some freaky looking shoes. like wal*mart casual gone wrong. And I'm not saying your sweats have to be expensive to look good or work with it, you just had to find the right ones and wear them the right way, which takes a little more thought.