When I first started P90X, I absolutely dreaded having to do Dive Bomber Push-Ups. I used to run out of gas before I was able to eke out any more than 6 or 8 of them. Now, I (almost) look forward to this move. Dive Bomber Push-Ups engage your entire upper body, and you also get a good back stretch during each rep when moving from Downward Dog all the way to Upward Dog and back. This particular push-up variation helps increase range of motion and flexibility in the hamstrings, shoulders and back -- and when it comes to flexibility, I need all the help I can get.
Plus, Dive Bombers aren't nearly as batshit crazy as some of the other exercises in P90X and Insanity. (Everything's relative, right?)