I'm sorry, I love the F word. No word has such a crisp, clear zing to it. When punctuated, it can make a point clearly, very fast.
It is the most versatile word in the english language.
It is a noun, a pronoun, a verb, an adjective, a prefix, a suffix...in other words, it can fit into almost any sentence, and can be used with every topic.
When I stub my toe, it's my word of choice. I wish I could say it more, but I don't say it that often anymore.