Pretty horse! Is he/she a Lusitano cross?
You have a straight line from your elbow to the bit, which is very nice. However, it looks like you are forcing your heels down, which they seem to like in the H/J ring, but in dressage you want a relaxed heel to absorb shock and motion of the horse, never looking like it's forced down. Also, you want a straight line from your ears to shoulders to hips to heels, which isn't shown in this picture. However, I think this may be related to the above about your forced heels; I think if your legs were relaxed and ready to absorb, your legs wouldn't be so far forward.
All in all, you two seem like an awesome pair! :)