I love Cap 1 (don't get me wrong), I just think that Cap 2 is BETTER. Except for the hair. The WWII style just really, really worked for me. It made Steve look classic and put together whereas I think his modern hairstyle (though logical from the character's perspective of adapting to the modern world, as other have mentioned) veers too close to frat-boy territory sometimes.

The complaint is petty, but it nags at the back of my mind when I watch The Winter Soldier.