Storms.

I like how you get a unique sky, which looks mostly like there's something not quite right going on up there. (Probably caused by the thick but localised cumulonimbus clouds, which block out the light in a manner more often seen of huge dreary stratus coverings...)
I like the atmosphere, where you can almost feel that something's building up and is going to return to equilibrium in a violent way sometime soon.

What i like most about a storm is the aftermath. Immediately afterwards, you get the faint smell of ozone in the air, and the world just seems bruised, like it's withstood something.
I like how in the wide open space of morning afterwards, you find piles of gravel and rocks scattered around on the road under an empty, blown-out sky.