[tiltaholic]

from btspider's faq (in progress)

AF: aggression factor. This is an arbitrary number representing the relative frequency of which you are the aggressor on each street. The numbers vary greatly by your style and posting specific hands is generally better to determine if your aggressiveness is appropriate. VPIP/PFR account for your preflop aggression, so generally ignore AF - PF. Your postflop aggression will typically be around 2 - 3 on each postflop street. The flop is often higher than the turn and river, often exceeding 3.0. A micro posters overall AF (not including PF) will typically be in the 2.0 - 3.0 range. Some posters report success with overall AF's over 3, but nearly none have AF's under 2. This is not a stat worth overanalyzing unless it is woefully low or maniacally high.