I have to say, I think I really enjoy the fun ones the most, usually involving a lot of people just breaking out and dancing all over the place, LMFAO's Party Rock Anthem is a prime example.
It's got plenty of humor too. And Jesus dancing at the end.
So in the process of naming your favorite video, post a link too obviously.
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~Halo There is no Crane, only Scarecrow!
http://img195.imageshack.us/img195/3739/scarecrowq.jpg