1) In general, I like the UI
2) I'd like the ability to choose text size, especially in regards to pvp announcements or the ability to turn PvP announcements off. As mentioned by chilango in another thread, the constant stream of PvP announcements is both distracting and covers too much of the screen.
3) Custom key bindings, please!
4) Option to turn off general notifications, especially in PvP.