I am going to throw in a woman's perspective. For me, doggy is the position I want to be in when I want it to be primal. With my hips in the air the guy has leverage to thrust harder for a longer period of time. Also for me, it puts me in a position where my lips tighten up and I can really feel his shaft sliding in and out.
However, I do prefer missionary or a variation of missionary when I want intimacy and to feel his explosion inside me. By being on my back I am able to see his eyes and watch his reaction to his orgasm which heightens my enjoyment. By raising my legs into the air it allows for some serious penetration while my whole body encloses around his shaft. Then its like a huge hug and squeezing as he cum's against my deepest walls.