I forgot to mention Morganthe's outfit, and the flame wings should most definitely be available for purchase as a permanent mount (another not so subtle hint, hint) Maybe even in different colors, like the fairy wings are (an outright hint, hint). I know I would most definitely buy them!
I myself would love to see more varieties of plate armor. I love the Raven Hoard gear (especially the gold and blue variety), but it might be nice for less raven-like apparel. Maybe some heavy duty samurai armor, or a nice, shiny, medieval knight outfit.
I'm late to the party yet again - but I'd like to dress like Diego or the guy standing outside of Golem Tower in WC - i.g. something a little more rogish or mature - perhaps dangerous without the pirate cartoony look :)