This is completely just my own opinion. I hope that you take it in the good spirit in which it is written:
First, let me say what a nice horse that you have. But, to take the bad with the good, I would delete the first photo. In that shot, he appears to fall off behind, be mutton withered, and tie in exceptionally low. He also appears very short in the neck and looks to have an awful shoulder. Some photos are just bad. I know that because the second two shots that you posted show a completely different story.
It appears that he is a little splay footed in the right fore and slightly cowhocked, and his forearm to cannon ratio is slanted in the way of the forearm. This tells me that he has promise in regard to upright movement, well that and the angle of his illium and the ability to get under himself. He has a very nice neck in comparison to the first photo and is not at all mutton withered. He looks to have quite a nice croup as well, though I'd like to see the triangle over his tail a bit more refined to show the driving power of that back end.
He has a very pretty head, despite being a tad long of ear. I also would like to see his hooves more blalanced. He's quite long in the toe and low in the heel in these shots, though showing a pastern that is long enough to produce nice, springy action without being so long that one would think him prone to breakdown later in life. The long toe will effect his breakover and muddle his movement and that's an easy fix with a good farrier. His shoulder is quite a bit better in the lower two shots than the upper one. The one positive in the first shot is that it shows his ability to reach up with the inside hind. This is very important to collection and overall athletic ability.
He is a nice gelding.