Missionary is my go-to position, for so many reasons. I can enjoy the fear and revulsion in her face. I can feel her body buck and thrash around under me is she's a fighter. If she's not, I can still enjoy the sensation of, "crushing" her helpless body under me. Especially her breasts and belly.
And while we're on the subject of breasts, Missionary gives me the perfect viewpoint to watch her boobs shimmy when I'm pounding into her.
Doggie runs a close second.