Chris Dahlen (Kill Screen)
As the man in charge of the gaming's best academic magazine, Kill Screen's Chris Dahlen is an intelligent dude. He tweets all sorts of wonderful stuff, most of it relating to Real Life stuff rather than internet shenanigans. (You'll see comics, games, and tech come up, too, don't fret.)
Hilarious quotes from his kid and thoughts on important writings dominate his feed, which is active enough to remain interesting while making you wish he'd tweet more.