[krimson]

You look a tad tight. You can definitely open up your a range a small bit, and especially open up on the CO and Button (15% vpip for these positions is very low, I think I play around 21%+ or so on the button).

You may also be slightly too tight post-flop and folding some winners. Your wtsd% compared to w$sd suggests you aren't going to showdown often enough. You may be taking lines which allow you to be pushed off your best hand, or trying to push others off worst hands (which would explain the fairly high AF), rather than noticing the correct opportunities which allow you to passively showdown what may be the best hand.

Learning to play short handed would definitely help with both the above issues. (ie: opening up your hand selection, and seeing good hands to showdown).