As a whole I agree that staying on the horse and not falling off is always a decent rider. I also agree that your body looks good. I'd just be careful in the trot that you are not bumping her sides by mistake/accident. The biggest issue (as you yourself already know, and good job for being able to critique yourself!) is your hands. Your arms are a bit forward. Adjust the reins to move your entire arm so your elbows are more in line with your body. I know it is hard to feel yourself sometimes and know that you are "doing something wrong" without someone physically looking and telling you while you are riding, but that is what makes for a goo rider. Feeling is -everything-. (I know this because when I jump my mare I sometimes miss the wrong lead because I'm so focused on the jump, not how my mare is behaving. Oops!) If you have to physically look down at at your hands to make sure your thumbs are up, then do it. It'll help you for the future. Also your hands are a little high at some points. Again, mentally think to check this as you ride and fix it if you notice it. If you have permission to move the jumps, put them in one corner and try riding in circles to get off the "safety" of the rail. As a bigger challenge, set up the jumps as an obstacle course. You don't have to be a jumper or even go over them, but ride a circle around one, we between two, etc. It'll give your horse something to think about and help you learn to feel your body better by getting off the rail.
Keep on riding!! You are well on your way. At least in my opinion.