Hello!
First off, let me say I love your horse, don't think I could get tired of his photos...

. I will do my best.
...*still gazing at him and drooling without a nod towards conformation*... hehehe...
...* Now straightening up and putting on the horse-judging face*...
To me, there really isn't alot to pick on that would be a serious problem. Pasterns are a little short, he appears to be a little 'over' at the knee, but that may be just the way the photos making him appear.
I really like the way his sections all fit together with relatively same length. Hocks and knees are close to same height. The slope of his shoulder is very exceptional to my eye, he appears to have a "goose rump" but that is mostly due to him standing under himself in the back.
Now the neck would differ from everyone's opinion. A halter class might like a slimmer, trimmer neckline better (kinda' hunky) but I like that neck personally. It ties in well at the shoulder, Throat latch though, is thick. That would make it harder for him to get on the vertical.
He is a tiny bit cow-hocked and in one photo is standing toed-out in the front- may just be the way he was standing at time of photo shot.
Now for back legs, he stands underneath, but if he were to be straightened out, where fetlocks and hocks would be perfectly vertical one underneath the other- he would have to camp out in the back. Which just means stifle (stifle, no, what is it...something... FIBULA- is a tad long. The ideal would be a straight Vertical line from: Point of rear- to point of hock- to back of fetlock. And his legs would stand out a bit further back than the point of his rear, in order to be perfectly vertical. It's hardly noticeable.
Beautiful head with thick stallion jaw, tapering down to a small muzzle, eyes are well set and expressive. He has such a cute face (if I can say so for a guy

).
Overall, nothing really stands out and says NEGATIVE. He has very decent conformation to me, I really like his stockiness and hunky build.
...did I mention I really like his build?? Lol...
So that's my best. I'm no certified judge- I did take horse Judging, and hippology for 3 years and competed in MTSU- so I can say I have an "idea" for what I'm looking at.