Any position if she lowers her upper body towards my feet while I'm inserted in her vagina. My cock is erect at an upward angle and if she bends backward it hurts my groin.
To be fair I've only tried three or four positions but I really don't like doggy. I can't see her face and sometimes her butt smells.
Only one I didn't like was the man on bottom 69 position with woman and another man doing her doggie. A little too close, moved out quickly. No way did I want to be in line of fire.