Okay...
I'll admit to being a Family Guy fan.
There... I said it. Out Loud. In Public.
Yeah, probably the Simpsons or Family Guy.
I found this list on TV.com
1. Family Guy
2. Naruto
3. The Simpsons
4. Pokémon
5. South Park
6. Avatar: The Last Airbender
7. SpongeBob SquarePants
8. Bleach
9. Ben 10
10. Dragonball Z
11. Ben 10: Alien Force
12. X-Men: Evolution 2000
13. American Dad!
14. Futurama
15. Batman: The Brave and the Bold
16. Wolverine and the X-Men
17. Total Drama Island
18. Teen Titans
19. Digimon: Digital Monsters
20. Yu-Gi-Oh! GX
21. King of the Hill
22. Inuyasha
23. Yu-Gi-Oh! 5D's
24. Phineas and Ferb
25. Yu-Gi-Oh!
I miss the old 80s cartoons that weren't trying to sell you crap. Shows like the Animaniacs; Pinky and the Brain; and Freakazoid. Nowadays cartoons are either geared towards adults, boring teenage slacker fare, or are related to some crappy card game that no one over the age of 12 plays. Fortunately,Pixar movies seem to fill the void.