TV has changed a lot. Now, reality TV is emerging force behind situation comedies and drama. Also, many shows opt to use a classic rock song (for example, CSI using The Who) instead of their own TV theme song. I do not doubt that there would be a sound business case there, but many times the TV theme is what we remember from a TV show... These are my top 20 TV themes of all time...
1. M*A*S*H*: "Suicide in Painless" by Johnny Mandel
2. Cheers: "Where Everybody Knows Your Name" by Gary Portnoy
3. Gilligan's Island: "The Ballad of Gilligan's Isle" by The Wellingtons
4. The Addams Family: "The Addams Family" by Vic Mizzy
5. WKRP in Cincinnati: "WKRP In Cincinnati Main Theme" by Steve Carlisle
6. The Flintstones: "Meet the Flinstones"
7. Batman: "Theme from Batman" by Nelson Riddle
8. Friends: "I'd Be There For You" by The Rembrandts
9. The Banana Splits Adventure Hour: "The Tra la la la Song" by The Banana Splits
10. Mission: Impossible: "Main Title" by Lalo Schifrin
11. The Muppet Show
12. The Greatest American Hero: "Believe it or not" by Joey Scarbury
13. The Simpsons
14. Happy Days
15. Dukes of Hazzard: "Good Ole Boys" by Waylon Jennings
16. Beverly Hillbilies: "The Ballad of Jed Clampett"
17. The Sopranos: "Woke Up This Morning" by A3
18. Hawaii 5-0
20. Big Bang Theory: "Big Bang" by The Barenaked Ladies