I can't watch much basketball since the game quality is so poor these days, but do watch home team play. I watch football, but with Tivo. Tennis is the one of two sports I can watch through and through. Cricket is fun to watch if its a day match only. Martial arts is good, since its quick. Boxing is the other sport I can watch in entirety. Soccer- I watched every single televised game of World Cup last year.
Football: Longhorns, Texans, Titans, NCAA Bowls (some), MNC game, NFL playoffs (most), Superbowl (first half usually) Basketball: Longhorns, Rockets, NCAA Tournament Golf: depending on the weather on the particular Sunday (final round), Masters Soccer: USA, almost any World Cup match UFC
Baseball - probably 1/2 of Astros games, a smattering of other MLB games, and the playoffs. A few Lamar Baseball games live. A few international games. Basketball - Every Lamar home game and televised road game. Probably 3/4 of Rockets games. Many other NBA and College games. Most of the playoffs. All day during March Madness. Good High School tournaments. (Yeah, I'm a little obsessed.) Football - When I get a chance to watch Texans games. Oklahoma State Games when I can get them. All the January bowls. The Super Bowl. Soccer - World Cup only, pretty much. Hockey - A few Texas Wildcatters ECHL games. It's brutal on TV. Boxing - Big matches, when I catch it other times. Racing - Every MotoGP race. A few AMA races like Daytona 200. If I need a Sunday nap, sometimes I'll turn on NASCAR or IRL. Olympics - A lot of it, as long as it's live. Others - International competition in Softball.
Basketball- Anything except for when really scrubby teams are playing, all playoff games/College- UT games(this year only for Kevin Durant) and NCAA tournament Baseball- Astros and Red Sox games, Playoffs Football- All NFL games, especially Chargers and Texans/ All UT games, and usually big games every week Soccer- Premier League games, Champions League, All US games, World Cup Tennis- Grand Slams and whenever Nadal, Hewitt, or Roddick play