Critique Muscle Buildup and Confirmation!

Could someone please critique how my horse is building muscle? Also, if you could, critique his confirmation?

The first picture is from a year or two ago, the second, third, and fourth ones are from more recently (a month or two ago).

P.S.- Excuse my awful positions... Especially in the first one. I am slowly getting better... But it's not too bad? Hmm... While you're at it, maybe you should critique my position, too?

He looks a lot better though it is impossible to give a good confo critique with him under saddle or moving. I can't critique your position as I don't know much about proper english riding..... Other than the fact that you have piano hands. You need to have your thumb up with palms facing each other.

Well, I can see that he and you look a lot better.
What breed of horse is he? In the first he looked like an arabian but then the other pictures changed my mind..
I wouldn't say you have piano hands or puppy paws like I call them but you could stand to turn them up a bit more. Your heels look good and you are alert and watching where you are going. I like to see that. :]

He's an Arabian cross. We think he has some QH and a gaited horse breed in him, but we're not sure. He was a rescue, so we can't be sure of anything.

He is looking better for sure than in the first pic but he does look to be very heavy on the forehand. Work on really getting his backend under him and pushing is body forward. That will help with him hollowing out his back so much and rounding much better which in turn will get his head down where it should be. He is a very cute horse though and you two deffinitely look to make a very good team.

Cute horse!
You need to bring your arms back, your elbow should be hanging at your side, almost straight down from your shoulder.

He looks much better. His shape would even improve more with some collection. He looks hollowed out with his head up and nose out.

He looks alot better. His butt was really pointy in the first pic and now it is rounding out. As for you I would say you need to bring your arms down some. Good luck.