Depends on the steak.
When I'm cooking for myself, I generally go on the rare side for thinner cuts. And I prefer a slower cook with more of a good gradient that most would consider closer to medium-rare or medium for thicker cuts. More marbled cuts, like ribeye, are also generally better closer to medium (gotta let the fat cook). Leaner is better rarer.
At a steakhouse, it's often useful to say "as the cook recommends". At a more dive-like location, medium or more is a little bit safer.
Also, Um Actually..., your poll is missing the black-and-blue option, which is essentially char on the outside and rare on the inside. Not my thing, but I know people who like it.