My favorite position at first is to lay on side, this is the best position to control his cock pushing into my tight ass. It is very relaxing to lay together and feel each other deep inside.
Later i prefer to ride on his cock while sitting on his cock, looking in his face and force him to fuck me harder. This is my favorite position to cum, feeling his hard cock deep in my tight ass!
When I am really horny, a fuck in the doggy style position could be very fine....