I don't have the height problem so I never go farther back than row 14. I have a twitch that developed as a result of flying and watching non regular flyers 1) Try to figure out where their seat is 2) Figure out how to get their stuff in an over head 3) realize they are in the wrong seat after being told by the person who is supposed to be in that seat 4) Watching them do all of this in reverse order with a bewildered look on their face as they struggle to recall which overhead their bag was in as they take 2 minutes to open 4 units returning back to the first one they opened and grabbing their bag.