For the QH's,
1) Keep, of the three, he is the best looking. He isn't spectacular, but he looks like he's got a good hind end. Bloodlines would definitely play a part in keeping him or culling him but he is the best of the three.
2) Cut, he's got funky conformation, I agree with smorbs that something just looks wrong with his back, and he does look like he's in pain. His shoulders are too steep, and his front legs are set way underneath him.
3) Cut, he's also got some funky conformation. He does have a pretty nice head, and good neck. His hocks are a bit too straight, his hind legs sit a bit far underneath him, and his neck doesn't tie into his body as nicely as horse 2.
Really depends on what type you want.
1) Cut, he is definitely nice looking, but his back looks a little bit weak, not quite as nice as horse 2, his butt slopes a little too sharply, and his tail is set a bit weird.
2) Keep, he's got a nice level top line, he's got that nice round butt, good leg bone, looks like he's got a nice wide chest, and he just looks a little bit thicker which I think a draft horse should be.
3) Cull, he's a bit too refined, got thin legs, his butt isn't quite as nice looking, though he does look like he's got a nice back, he just over all looks too long and lanky, though I might keep him and see how he fills out if he is young.
1) Cut, even though he's clearly a baby, he has a huge butt that does not fit in with the front half of his body. His neck ties in a bit too high to his body, and he looks a bit ewe necked.
2) Keep, he has a nice shoulder angle, good hind end, looks like he's got a nice topline, it looks like he has a nice amount of curve from his hock to his butt.
3) Cut, he is a plain looking, his hind end is clearly higher then his withers, making him extremely down hill. He is lacking muscle, has a week looking back, and a short neck. His shoulder angle is too straight, and just lacks in a lot of places.