My experience with Linux began 6 years ago when I was 15. It was an alternative to Windows ME for me (dual boot) so it was pretty good. In the end I got bored with it and installed Windows 2000. Once Windows 2000 finally peed me off for the final time, I formatted the whole disk and installed Mandrake 9.0
5-6 years later and I'm still using a pure Linux installation on this, my main rig. In the same way as frustrated first-time Linux users go back to windows for a few months, I can't use Windows now, it just irritates me to the core.
It's my computer, so I choose the software, not Mr $$$
I'm glad NVidia support us.
I use cedega for Steam games but that's about it, Quake 4, UT2004, UT etc all work. There are other games available too like Serious Sam 2 but I don't have that yet :P