I use IE6 at home, IE5 at a Mac at school, and Netscape 6.2 at my mom's work. So far, IE6 is the most stable, IE5 on the mac looks the coolest, and Netscape, after taking some time to load, works ok.
But for those who call XP's new GUI teletubby, I think Netscape 6.2 is more teletubby than IE6. Netscape is all that ugly shade of blue, all the icons look the same and are huge, and the loading bar is constantly on the move.