I actually liked the sleeveless look Thor had in the Avengers during the confrontation with Iron Man in the forest. His look seems more refined in Thor: Dark World.
I do like Man of Steel's costume, but I would have liked it a tad more if the colors were a bit brighter. I'm actually hoping they go the New 52 route for the costume eventually in live action form.
Am I the only one who thinks that Superman's costume makes his arm looks kinda short thus making him look UN-proportioned or something?
Anyways, Superman's new costume in MoS is leaps and bounds better than all of his previous movie costumes combined... even if his arms looks short or his body looks longer...removing the red undies was a good move, but the all blue makes it look bland.
With that said, Thor looks way cooler.