Saying "fuck" instead of something else is a cop out. It's so easy to apply this general, emotional term, and much harder to express what you actually mean. I've taken to, after I say the word, to try and think of a better way to express myself. Rarely was it the best word choice, but it's such a habit that it's hard for me to do this analysis before I say it.

Another mode I get into is saying it out of frustration. It's like a tension release valve. It seems to make me feel more calm. Of course, during this latter use I'm almost always alone, so it's not applicable to the linked article.