I used 3.11 for ages... i was afraid of 95... even though you can change 95's interface to something very close to 3.x> ... Loved that stuff so much. too bad i cant play CS and Halo on it or i would actually use it now
W2k for me
-tried and true
-if you compare the number of fixes for XP and 2k, xp has like 3 times more, and its only been out for half as long! I think this says something important.
Currently I am using Win 2k SP4 on both my computers. But PYZCHOB!+C# will be getting Win Xp Pro installed on it this week end as I need that OS to talk with the server at work. (and my boss finally gave me the MOLP lience for it as I told him that i am not paying out of my pocket for a OS that I really don't want in the first place so I can do my work from home. )