Hawk & Dove and The Beast

 

I liked the fact that after their transformations into non-human forms, characters like Hank McCoy and Ben Grimm decided to lean into it and just wear trunks as their entire costume - they weren't hiding thier new appearances from the world!  It's too bad the movies aren't following suit, with Hank in his lab coat and now a fully suited Thing in Fantastic Four: First Steps.  Even The Hulk is completely dressed these days!