Sample tweet: "I'm injecting Charlie Sheen between my toes right now."
John Hodgman isn't your typical stand-up comedian. He's more of a multiplatform humorist. The author, podcaster and occasional Daily Show correspondent has branded himself as a consummate expert in everything, although you probably know him best as the PC guy in those Apple commercials with Justin Long. Hodgman tweets constantly, and whether they're replies to fans or retweets of his humorous peers, his feed is chock full of fun facts, witty banter and genuine fun.