I'm using Windows 7 Pro x64 and Windows XP x86 I find Windows 7 excellent and perfect for my games and viewing my movies and all... But if you're from Vista to Windows 7 you probably will be used to most of the things except for some minor changes...
Furthermore, Vista is much much larger and takes up a lot of space using lots of your computer power, so if you upgrade to Windows 7 it'll probably free up lots of your computer space allowing your computer to be very much faster than it is right now.
So in conclusion, I'm all for Windows 7.