I personally like his new hair, for some reason I don't associate this new look with any band stuff or anything, it just maybe tells that he's been in jail for a while and hasn't had a possibility to take care of him the same way he did before (And taking care of it in his case is a matter of opinion, I think his new look is much more fresher compared to that oily style he had x))
Oh my gosh, don't get me started on the oily look he was sporting in the Avengers ... I was afraid he'd do that, only longer! This, though, this I can get behind. Literally, too. I REALLY want to sneak up to him when he's asleep or something and braid his hair. I desperatly want Loki with braids in his hair - that's not weird or anything, is it?
Hahah, I suppose it isn't : D Little braids among other hair would definitely look nice, but Thor already has them so I guess it's not an option for Loki anymore x) And unfortunately (or I don't know is it unfortunate, we'll see) Loki seems to go back to his old style when he gets off the prison, if I can trust what I saw in that tiny part of the trailer.