I'm not very good at conformation but he looks alright. His neck is a little thin and he could use some more muscling though that comes with age. For a 19 month old he looks very even from withers to his butt which is great.
(Love how the other horse is trying to lead him away!)
Not liking his whole front end. I'm certainly no good at critiques, but it just ties in weird. Then again, he is young so he could grow out of it. I wouldn't take my opinion though, I'd wait for some of the pro's on here to comment.
I don't see anything terribly wrong with his front?
His neck looks like its set slightly low and neck is slightly long, but all in all a pretty well put together horse, nice jaw and whithers and his back isnt too long or croup too flat, dosn't look to be over at the knee or have any leg issues.
If I sat here and analyzed every detail im sure I could pick out more "faults" compared to a diagram, but no horse is going to be perfect. He is a nice horse.
He looks like quite a nice horse, although as someone already said he needs muscle. He has the typical high withers of a TB but other than that I really like him. I think with muscle and a shiny summer coat after winter he will look great. I think he will be quite solid though if he is already that chunky at 19 months :)