For me the themes from the Lucy series(all three of them), Green Acres.Petticoat Junction and, of course, who can possibly forget the theme from "My Three Sons?"

Wow did I love NIP TUCK! I missed it during the original broadcast, but based on what people have told me, I gambled on this box set at http://www.buybestdvds.com. I feel like I hit the jackpot.

It's definitely not for everyone though. No sirree.

maybe it's theme songs that get stuck in your head?
either way I would vote Gilligan's Island , happy days was just a top 40 song from the era the show depicted.

if we're down to just those two, I vote for Gilligan. it's more fun, and it fits the show better.

If you're going to go just for singable ones, how in the world does "The Brady Bunch" lose? Or "The Addams Family"? I've never heard anyone sing the "Happy Days" theme song for fun.

So many have a lot of meaning to me:

MASH
Rockford Files
Greatest American Hero
Hill Street Blues

M*A*S*H was the best theme song. I still love that show.