Windows 7 isn't bad, it's faster depending on how much RAM you have. If you have 2 GB of RAM I think it's pointless to use 7 because XP is much faster(yet I use 7 anyway with 2 GB of RAM, that's why I know).I use my laptop. Duh. *computer noob*
I'm just kidding. I use Windows 7. I don't really know that much about operating systems, so I wouldn't know if there are any better ones, or even if Windows 7 is a bad one. But it works for me, so I guess it's fine.