Since everyone else is waxing faggy, I'm going to say thunderstorms. We almost never get them here, but whenever we do I feel compelling to go to the top of a mountain and watch them (real smart, eh?).

When I was a kid they scared the shit out of me, but my Grampa used to make me sit up with him and watch them with him; eventually I became unafraid and now I love them. I'd really like to go to the prairies and see some real badass thunder storms.

Come to think of it, I like storms of all types.