[bobbyi]

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AF is useless and will not converge like in 10k hands... I've seen total brainless maniacs with AF <1 and weak-tight rocks with AF>3.

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This doesn't show that AF is "useless", just that you don't understand how to interpret it. Why would you expect a "weak-tight rock" to have an AF below 3? That wouldn't make sense. The meaning of "rock" is that you do very little calling. You mostly sit around and fold until you get the nuts and then bet and raise. This style is accurately described by a low vpip, a low went to showdown % (given his vpip) and a high AF.