AF means basically nothing over 30 hands. It takes quite a long time to become reliable, somewhere around 500 hands you may be getting a pretty accurate number.
Anything below ~250 hands and you can get a more accurate decription of the player through their vpip/pfr gap (The higher the gap the more passive they are). Someone playing 14/9 is not an aggressive player but I am always stumped with min raises. You get such great odds
to call but we kill ourselves on later streets.
Once you call the turn we must call the river as it hardly changes anything and again it is a small bet.