I prefer Win2k...
General info on me: I worked at my ISP for about a year and a half providing support over the phone, and have worked at my current job for about a year, one of three techs providing support to about 550 computers for a county gov't. I'm
definitely not saying I know it all - just saying that I'm
not John Q. User buying an E-machine from RadioShack...
My PC:
PIII 500
Gigabyte GA-6XBC mobo w/ Intel 440BX chipset (with required BIOS update)
Western Digital 20GB 7200rpm HDD
128 (later 384) MB PC100 RAM
Diamond Viper V770 AGP (32MB)
SoundBlaster Live!
etc...
Win98(SE) was a pretty stable OS for me, and very compatible with games and/or multimedia. I found that adding -more- than 128MB of RAM
did slow it down a little in Windows. UT ran pretty well, but not "great"... I'd average around 25-35fps...
WinME was o-k for games... didn't notice an improvement over Win98(SE), though. However, I did have lots of problems with the screen savers and power management. Every time it went to screen saver and/or suspend, it would BSOD and I'd have to restart rather frequently. Windows operations (menus, opening/closing programs, etc...) weren't any faster than 98. Needless to say, I wasn't impressed.
Win2k Pro has been very good to me. I first installed it at work as a dual-boot with Win95(for support purposes). The machine is a DigitalPC, Pentium 200 w/MMX, with 160MB RAM. Win2k made a HUGE improvement in speed in normal Windows operations and programs. It also made the system 100% more stable... Win95 used to freeze 1-2 times/day. On my home system, I noticed the same performance increase in Windows operations... and also noticed a large increase in my UT fps as well. Last night I played a match in the single-player tournament... My minimum fps was about 40, and my max was about 63... my average was about 50.5... it was SMOOTH and FAST as hell...
I love it!
I'm not pro-Micro$oft... it just seems like they finally made an OS for higher-end systems. Win2k seems to handle fast CPU's and mucho megs o' RAM much better than Win98(SE) or WinME.
As always - this is my opinion based on my own experience.