You know, that theme song that even if you TiVo the show, you listen to anyway instead of blasting through it...... Just throwing it out there (yeah, I have a job!) Best Current- Saving Grace by Everlast, for the show of the same title. Best All Time- Gilligan's Island!
+1 on Magnum PI. What's that song at the beginning of Whale Wars? That is the only thing I can think of for current.
i dont know about best current or all time theme song... ...but i know i'm always singing "whoooooo are you, who who, who who..." for hours after watching CSI. Ow, tell me who are yoooouuuu...are you, who who, who who