QH conformation evaluation

Hello,
I'm new here!. This quarter horse is 5 years old, 15 hh, and very out of shape. My plans are to start riding him this fall when I get him moved out to my place and its much cooler out. He's very muscular so I'm trying to take him in a direction that would be the best for him. Please give me an honest review of his conformation (positives and negatives) and also what disciplines he would excell at? Nothing will offend me, I actually got him for free with his papers when he was a yearling... so he's been my little project. :)

Really need some better pictures, front and back too.

And posting his papers will give a better idea of what he is bred for.

To me, he seems a little downhill, but that could be photos and the way he is standing.

But get us some better photos, where he is squared up. And papers.