Its just your personnal perference... I'm the opposite, I hardly ever apply AA and when I do its a small amount like 2xAA.
I had crossfire HD5850's and when I swicthed to GTX570's I noticed that in many games you can apply higher level's of AA.
Are you gaming on a laptop?
For now yes, but im buying a new one PC with i7 2600k + HD 6970.