I prefer GNOME as well, I've found GNOME with Compiz, Emerald, and AWN to be the most productive and most beautiful environment I've ever worked with. Right now I'm using the Aurora Leopard theme off off gnome-look.org.
However, it is very resource intensive, and can't run it on everything I have in service in my home. I used to run XFCE on my old Athlon/256 meg Compaq Presario 700 Laptop, but the most recent releases of Xubuntu have been using almost as much resources as GNOME/Metacity.
I've recently turned to Fluxbox. Its takes a little kung fu to get it configured just right, but it uses next to no resources, has a system tray, and has a very nice set of themes, at least the Debian/Ubuntu packages do. I don't run it on my Acer Gemstone with 2 gigs of ram, or my desktops which all have 1 gig or more, but its a good alternative for those resource limited machines.