Fuck is my favorite word since it is by far the most versatile word in the entire english language. It is a word that can add emphasis in any fucking situation. Fuck can even display countless emotions. For example you could say "FUCK YOU!" (anger), "that is fucking unbelievable" (disbelief), "what the fuck?" (confusion), "what the fuck?!" (shock/dismay/worry), "fuck."(disappointment/shame/frustration). Therefore i can't think of a word that i like more than fuck.