While I can't even call myself a "beginner" yet in regard to grasping conformation, (though I can finally see the really obvious flaws and the very clearly excellently conformed horse...hey, it's a start!), I can say two things for certain about him.
1) He has a tremendously kind, soft eye...I'd imagine he's sharp and will be a willing and hard-working mount for the rider/owner he loves.
2) I notice that in nearly every pic his ears are fully pricked forward and interested. Another plus in my book that he'll be quick to learn, enjoy his work, & just be a happy/lovey guy to own.
Lucky you for winding up with him!
Best to you and to him...can't wait to see him all fattened/muscled up in a few months!