I swear fairly regularly. I've had stuffy old ladies tell me I should curtail it, and I would if people would stop PISSING ME OFF SO MUCH. >_<
I do honestly try not to do it every other word...I knew a guy once that it seemed like every other word out of his mouth was some sort of variation of "fuck" or in relation to his dangly bits, which frankly I didn't care to hear about. That bothered a lot of people we both worked with and frankly I was glad to see him get fired. Swearing appropriately is one thing, and as a joking, overly-excessive manner is another. But doing it just for it's own sake is just...ugh.