I use Vista but my PC is geared for gaming. I've never had one single problem....ever.
So Pinocchio, did your nose damage your monitor after telling that one?! lulz
If that's the truth, and you weren't making a funny, consider yourself one the fortunate few.
We all know that using any Microsoft OS is like having sex with a fine looking women who has herpes. She needs to keep taking medicine and YOU better use protection or you too will be infected at some point.
With that being said, I use 2000 Pro, XP Pro, Vista Ultimate, and Win 7 RC on my systems. I keep full system backups of each on external hard drives. System Restore has been total SHIT for me. It's easier for "me" to just wipe the system drive and reinstall from my backup.
I'd have to say that my Windows 2000 Pro and Win 7 RC have been the most stable MS OS's for me so far.
When I do run 2 OS's on one of my boxes, instead of dual booting I just change my HD jumpers so that if there is a HD problem or something really malicious gets in, I still have access to the other OS on one of the other drives and can pull the data from all the drives relatively easily.