I think you two make a nice pair, you both compliment each other and seem to get along well.
For you - In all the pictures, you seem like a passanger. Like your just along for the ride. You have a solid base and a generally good position o/f, however you seem mostly just "there" in all the pictures if that makes sense haha. It doesn't seem like your riding every stride with your horse and I can see you falling off if he ducks out at a jump or does something unexpeded. I had the "passanger" problem when I rode school horses. I knew they would do thier job and even if I fell off, they would still jump the course as if I was riding. My trainer at the time didn't really care that I was a passenger, so I never fixed that problem. :( It only really got "fixed" when I got Robbie since he is not push button school horse and he makes me think and ride every stride. Now I'm not saying that your horse is push button, it just comes off to me that he is very broke and has that school horse demenor. Do you maybe have a video to post so I can get an idea if your a little more "active" that what is being shown in the pictures?
Now that I covered that haha, I really do like your release over fences and how your eyes are always up looking for your next jump. Your not laying on your horses neck which is nice to see since soooo many people feel the need to crawl up the neck over a 2'6 jump. Your toes need to come forward but your overall leg position is nice. Also, try not to do the "hunter butt" and keep your back flat rather than arched which I see in the second picture.
Your horse - Overall he looks like a very broke and capable horse. Nicely put together, most dutchies are, and a very sweet look to him. However, he seems incredibly stiff o/f. It seems like he might have been ridden into the ground when he was younger because he just looks somewhat blah when he jumps. He has no spark or look of excitement and enjoyment when he's jumping. It seems to me that he knows his job, what needs to be done, and does it. Like a routine. I don't see that he's unhappy or anything, just not fully enjoying what he's doing. If you can see, in only 1 of the o/f pictures, his ears are foward. Every other one, they are pinned back like it's pulling teeth to get him over the fence. It looks like he's just coming to the jump saying "oh here we go again.." Now this attitude isn't from you. I can tell he is an older, very broke horse that has probably been ridden and jumped into the ground at one point making jumping for him more of a chore rather than a fun activity. I suggest changing things up for him. Take him for a trail ride. Set up some barrels if you have some and do a barrel pattern. Anything to remind him that he actually likes jumping and it's not a chore. It'll be like a mini-vacation for him and trust me, he will enjoy doing soemthing new, different and exciting. Making for a happy horse!
Now pleaseeeee don't take anything I said the wrong way. I'm only posting what I see. I think you two are a good pair and I want you to succeed in whatever you do, that's the only reason why I give my honest opinion. :)