Neither. I'd rather be alone. I can't be with somebody with an ugly face OR body, no matter how attractive the counterpart is.
But if the question were would you rather date someone who A, has an above average face, and average (not ugly) body, or B, has an above average body, and an average (not ugly) face; i would answer A, but i could handle either.
As long as they aren't a skeleton or fat I would be okay with the face :) Then again, if they don't have a great face but they do have a great body, that kind of makes up for it. Overall it just has to be balanced for me.