<b>TLDR: I hated Vista. Loved XP. Use Linux. Installed 64bit Vista. Vista Crashed and burned. Reinstalled with SP2. It just Works.</b>
I've been a longtime XP user. I use Ubuntu and RHEL at work. I use linux and unix. I hated Vista with a passion, thought it was a PIA and had so much config problems. I then bought a new PC (quad core 6GB ram, blah blah) so I figured I'd put Vista on it. First time worked ok. I updated my bios, it blew away my Raid 1. Got irritated and stopped screwing with it. Then SP2 came along in the last few weeks and I reinstalled my OS and installed SP2 over it.
It just works. Works perfectly. So simple to install Vista and simple to install the SP2. 2 reboots and I had everything working. Fixed the RAID issue, fixed the bluetooth issue, fixed some other quirks that drove me batshiz crazy.
I gotta say that I used to hate vista with the passion of a 1000 firey suns. Now I'm like "Well it's not too bad, what's the problem with it again?"