I swear a significant amount. I've turned it into a bit of a game. How original can my swears get? What kind of combinations can I come up with? How loudly can I swear, and get away with it? Et cetera, et cetera.
I don't see why it's so offensive to tell someone to 'fuck off,' as opposed to 'go away.' They mean the same thing. When it all comes down to it, words are just noises, and any meaning they have is something we came up with ourselves. So, essentially, words don't really mean anything.
Thusly, I don't care. Though I do clean my language when I'm around family or other such people, but also when I want to be taken seriously. Why does no one share my view on the matter? ;-;
On the side, it's much more satisfying to swear when you're pissed off. For me, anyway. I have no idea why, it just is.