What leaks are costing me the most money...(Waring Stats posted)

[PokerSparky]

Okay, so I've been playing poker "seriously" for about 4 months now. I moved up from 1/2 to 2/4 about 2 months ago, and I now have 10,000 2/4 hands logged in PT. I didn't want to make a stats post, so I decided I would just try and identify the deficencies in my game, and see what others thought were the the most egregious errors. (Obviously I want to keep improving in all facets.)

1. I don't feel I raise enough first in/blind steal. MY PFR is 10.2%, but I attempt to steal the blinds only 26.57% of the time.

2. I don't value bet the river enough. My river aggression is 1.82 [img]/images/graemlins/blush.gif[/img]

3. Post flop I'm not aggressive enough. My flop and turn aggression are 2.3 and 2.33 respectively.

4. I don't defend my blinds enough. I fold my SB to a steel almost 90% of the time and my BB over 84% of the time. Both these number are at the higher end of CMI's stats post. I think one of the problems here is that I'm uncomfortable with HU play when I'm not the original aggressor, I tend to avoid confrontation in blind steal situations.

So I guess this turned out to be a stat post after all. My apologies to the haters of those kinds of posts.

My question is: which of these areas is costing me the most money? My guess would be my problems on the river.