I can't get used to Gnome, can't get used to KDE4 (and while we're at it - also not to Windows 7). Maybe because I grew up with older Desktop Environments, but nothing even comes close to KDE 3.5.10 for me. Since I updated to Debian Squeeze which no longer used KDE 3.5 I've stopped being happy when working on my system :-( I'll have to check-out Trinity at some time, I'm just a little worried if that project has the man-power to really keep KDE 3.5 alive.