Join Date: Jun 2009
Location: British Columbia
It's difficult to critique these pictures, so I'm going to focus on picture #3 and your flat photos.
I'm not a huge fan of the forward seat, but I did utilize it when I was riding hunters. I'd like to see your back with less of an arch and maybe a little more relaxation in your arms (although it's definitely difficult to tell from still shots).
In your third picture, your weight is way too far forward, like you flung yourself up your horses neck over the jump. Bring your weight back over the center of the saddle and lift your chest just a touch. Your release is also a bit big, your reins are drooping and looping down which means you dropped your connection over the jump.