I absoloutely loved Windows 7, it was wonderful first starting it up. The amazing auto update features was outstanding, it would find drivers for ANYTHING. Even my generic USB device it found drivers for which I could never get to work on XP or Vista. When installing Windows I would already have the drivers and have Internet connection, which Vista or XP didn't have.
I liked the look also, but the only down fall was....
I got kicked by Punkbuster for API calls (not themes or anything), which is unfixable (hundreds have it), and I couldn't overclock.
I would get random BSOD a few seconds into bootup, nothing I could do about it other than stock. GTA4 @ stock settings = terribad experience