One tendency I honestly dislike in most titles in the genre is what I call the "christmas tree syndrome" of your outfits getting more and more TACKY and ridiculous as you start ramping up in power, plus usually showered by an inane amount of permanent magic status effects.
This is an ego thing I believe, especially in multiplayer games where players want everyone to look at them. In singleplayer games we just need enough options to please everyone. I mentioned crafting styles in another thread, dyes would be awesome as well.
As for that painfully bright armour, it makes me cringe because I always play stealth type characters in games. Someone else wearing that would be fine, useful even, because they would be getting all the enemy attention while I was attacking from the shadows wearing my simple darkened leather gear.
