Well, I'm not really sure which one to get... So many options :o Can you tell me which one is based for a casual gamer that doesn't have knowledge of computer programing?
Hmm... well...
Personally I run slackware, and love it. But it requires you to "get your hands dirty" so to speak, to make things work.
If that's not your thing, I'd say try SuSE. It's pretty easy to set up, but still has the power and stability needed for professional use. The reason I don't use it is that I don't like having to bend over backwards for the package management system to work properly.
Fedora is having issues right now, I wouldn't use it until they are fixed. Mandrake, as usual, is having bug issues.
But it really depends on who you ask.
If you want some (read: SOME) of your windows games to work, you'll need to buy transgaming's wineX...
:)
~psi42