Running a poll on the LoL forums about what their Least Favorite Champion is. Here are the results so far.
Teemo: 9
Nidalee: 8
Blitzcrank: 7
Shaco: 4
Darius: 2
Garen: 2
Jax: 2
Kennen: 2
Singed: 2
Soraka: 2
Draven: 1
Fiddlesticks: 1
Graves: 1
Heimerdinger: 1
Jarvan: 1
Hecarim: 1
Kayle: 1
Kog'Maw: 1
Malphite: 1
Miss Fortune: 1
Lee Sin: 1
Poppy: 1
Sona: 1
Tryndamere: 1
Xin Zhao: 1
Yorick: 1
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Black Turtle did a pretty good job.