Personally, I use Fluxbox
for my desktop environment.
I like a lot of KDE's apps though, so I use Konqueror as my file manager, Konsole as my preferred term (though I'm not really that picky when it comes to that), Kmail as my main email app, and Kedit as my main text editor when working graphically (but I'm a vim kind of guy when it comes to working in a command shell).
Why don't I just run KDE, you ask?
Because I don't like it. I like the apps, not the environment. Fluxbox is a lot quicker and a heck of a lot more stable.
to fix stupid screenshot URL