Hill styles are no different than any other bow in that each bow is an individual i.e, not all bows of the same model will shoot, or feel, the same! Generally speaking they are all quiet, and smooth. The harshness at the shot has a lot of factors that affect it, so it varies with each bow, arrow, shooter, etc. My Miller has more thump in the hand than both my Shultz and Tembo, but it is a 68" and the others are 67" and 66" respectfully. I've found the longer bows to have a little more kick probably due to the extra weight of the limbs. However, it is also one I can shoot extremely well (accuracy) so that pretty much cancels out the little bit of additional kick, for me anyway! David builds an excellent bow and i'm sure you would be happy with anything he offers, just get it the correct length, weight, grip size and shape, and it should work for you with no problems.
Ken