I've been known for my insane ability to try out new things at an alarming/unhealthy rate. In my first 4-5 years I was a die hard KDE user but then as my machine at the time aged I started to go ultra-lite with fluxbox and blackbox on occassion. Sometime around my sixth year of using FreeBSD I started experimenting with Gnome and liked it. Ever since I've been hooked and use it primarily on my desktop. Overall I'd have to say that for me in the given situations here's my prefered usage:

Main Desktop: GDM/Gnome
Low-Resource Environment: Fluxbox
VNC over SSH: fluxbox :D

So what is your personal preference on the ab0ve three scenarios mentioned?