Pics straight on from the side are best but from those I can still see a few things.
(Love that liver flaxen coloring!)
I make no claims to be an expert by any means either! His shoulder looks to be on the 'straight' side of the spectrum, his back looks a little weak and maybe a bit long in a few pictures. It looks like he's a bit out of shape, with more muscling I think his neck would look much better (he looks slightly ewe necked in these pictures). I'm not sure if it's the way he's standing or not but it looks like he toes out a bit too, especially in the hind end.
He has a correct hind leg though it is not posed well. Really nice bone. Average shoulder and a good heart girth. I would like a lower wither and a better tie in fron the neck to the wither and the wither to the back. He may be a challenge to fit a saddle to. His coupling is a bit long. His head looks a little coarse and drafty (but you don't ride the head!!!).