KDE for me ... tried some of the others but nothing really did it for me, like KDE does.

I have heard the arguements against KDE like, "it's too Windows-like", "It's bloated" ... but hey, my main machines all have the space and the grunt to run it, I like it, so I am sticking with it.

I do have an old Pentium 200 running Slackware, so KDE is out of the question but it kicks butt with IceWM - the thing I do love about *nix is the choice ...