
I think I can sum up my requests in one word: speed.
As nice as extra features are (well, can be, at least), if the speed of the IDE suffers as a result, I'd much rather do without them.
I'm in the slightly odd position of using Eclipse at home, and M$ Visual Studio at work, and in general, VS does feel faster to use. I've possibly just started a war there. Sorry in advance if so :-).
However, whatever you do / don't like about VS's features, cost, language support, parentage, required OS, or any of that, it's code completion and navigation is just so responsive! Which is a real shame really, because I'd much rather work on my Linux desktop writing Java than WinXP / C#...
(Aside: yes, I could use gedit, gnome-terminal and javac, but I admit I need a little more pampering than that :-p)