Haha true. Even though I didn't really like Sealab, I loved the hell out of the theme. Same goes for Aqua Teen Hunger Force.
Some more good ones:
Trailer Park Boys -
http://www.youtube.com/watch?v=dI6Drn3OA70
Dexter -
http://www.youtube.com/watch?v=ej8-Rqo-VT4
Twilight Zone(for some reason I find it strange Outer Limits got mentioned and not this) -
http://www.youtube.com/watch?v=zi6wNGwd84g
Gumby -
http://www.youtube.com/watch?v=AhczFRlBT2E
Eureeka's Castle -
http://www.youtube.com/watch?v=PpnZPM99JSM
FreshChops, Pee-Wee's Playhouse is mindblowing, great call.