I would be the one who's in charge of taking care of the polar bears at the zoo. Or any other job that would allow me to have close contact with polar bears and not have to live in the arctic.
Second would be pastry chef, mostly cakes. I seriously considered dropping out of grad school to persue this. I went through with grad school, but my current job is just not making me happy. I keep coming back to the idea of pastry chef as a later-in-life sort of thing, after my yet-to-be-born children are older.
Realistically I'd like to be a professor. I love to teach. I just have to find an area of research that interests me and that I care about, in which I can feasibly start up my own research program at a university. See? Making cakes sounds easier, doesn't it?
The best part about going up hills is riding back down!