I almost never watch TV with the sound on. If I'm watching a TV show or movie with my wife and/or family, then yeah, it's home theater time, crank up the surround sound, subwoofer, the works. But if it's just me, I turn the TV down and crank up the tunes. TV is a visual medium. I'm only watching it to check out babes, watch sports, or maybe nature shows, but none of those require hearing the soundtrack.
Especially with sports, I hate hearing the announcers babble on incessantly about shit I don't care about ("You know Dave, that's the fourth time in the last 17 home games that he's picked his nose while facing a left-handed pitcher with at least two runners on base, at least one of whom used to play on a minor league team with a W in the name..."). I can watch the game just fine and crank out the jams.