I do! I switched from KDE 3.5 (whenever that was current). I love KDE's approach to making everything adjustable (as opposed to Gnome's "you'll get one button and you better love it") but with KDE 4 on the horizon it seemed to bloat too much for my tastes.

I love how it's a (for me) perfect mix of making a ton of things adjustable while appearing extremely no-frills. Easy on the ram, CPU, and eyes. 👌