Psyringe: Probably depends on personal preference, but my own experience with the AMD drivers has been less than stellar. Apart from the constant crashing, they didn't allow me to create automatic profiles for individual games (I had to create specific to launch shortcuts instead). On top of that, the ATI control center was incompatible with a couple of games; they simply didn't run when it was active.
Rohan15: I can do that in my ATI controls I believe.
They may have added it in the meantime, but just for clarification: In my nVidia driver, I can define a specific profile for any game, and the driver will load and apply that profile automatically when I start the respective game, no matter how I start it (Start menu, Windows Explorer, Games folder, shop client, etc.). That functionality was not available when I bought my last ATI card - there, I could create custom profiles, but I had to manually start the game with a specific shortcut, and manually switch the settings back to normal afterwards.
Rohan15: I have never had a problem with AMD personally.
I'm aware that my personal experience with ATI _can't_ be the experience of everyone else - if it were, then ATI would long be out of business. ;)
I was pretty happy when I could return to an nVidia card. I gave the ATI card to The Woman Of My Dreams (tm), and while she was happy about the performance, she _also_ experienced graphics related glitches and crashes that she never had before. She just now has the money to upgrade her computer, and one of the things she's most happy about is that she can finally get away from ATI. Only problem is that we'll then have an ATI card lying around that nobody will ever use. We consider auctioning it off, but are reluctant to cause anyone else the same trouble we had.