I've been mulling this over for a while in my own head and thought it'd make an interesting thread.
Personally, the thing that i'd most like to see is an extended Undo feature. As it stands, one undo step just isn't enough for me. I'm not sure how feasible it is to implement but i'm quite a compulsive undoer, maybe 5 or 10 steps would be enough, but the single step is just an annoyance.
I'm sure there's plenty of more usefull suggestions out there, but for me that's the thing i'd most like to see!
Anyone care to add theirs?