Maybe when doing dressage you can keep your elbows by your side a bit more and your hands closer together, level and maybe just a tad lower. Also, maybe in jumping just give a little more with the hands. At the jump it looks alright, but if he tried stretch a little more you might jab him in the mouth. Your position over the jump looks secure though :) over all not bad at all.
These look wonderful I definitely agree. In all of your pics you look marvelous, however I do also agree about your elbows. Just bring them in and back a tad. At leas in, keep them close to your sides when you ride =D