The original character sprites I've been using for Super Awesome were basically placeholders. I've been toying with the final proportions and designs, and I think I'm getting closer to something I like.
I'm also planning on having equippable vanity items (like coats, hats, scarves, etc) that the player can collect and change out through in-game menus. I think giving the player the ability to customize how he looks will add a level of personal investment in the character.
..... I'm a bit of a fashion diva when it comes to my game characters, if you haven't noticed.