I use armor kits and hair dye fairly often, at least once per character. The more they've TRed, the more I've changed their "look."
More options across the board so we can customize our characters' appearances would be welcome. A variety of flashiness, too. (On the current armor kit styles, #1 always seems to be the most reasonable and attractive, while #2 is like the flare fairy threw up at Bennigan's.)