My favourite sport to watch these days ? Jup: Starcraft.
If you want to get a glimpse of how deep Stracraft goes, check out the Day Dailies. Here is an analysis of Light vs Rarity on Heartbreak Ridge:
If you want something more light-hearted then DiggitySC is the guy to watch, in my opinion. He keeps it entertaining and exciting, but you still get to see the good stuff. Also, he has some of the very first commentaries up on Starcraft 2!
Either beats what's on TV most days.