Bones. Hands down. Dr. Temperance "Bones" Brennan, Agent Booth, and the Squints are welcome in my living room any time. The show is a good mix of science, investigation, humor, action, and a bit of romance.
(Granted, Bones suffered from the writer's strike a couple years ago with the axing of Zach, but I like to pretend that never happened since they've had some good interns since then... I'm still a little bitter, though.)