Spongebob also gets my vote. It had its moments, but let's face it, the only reason it's still around is because it's a corporate cashcow and it went the way of Captain Impressive, only around to sell products. All it does is line Nick's wallets.
Sort of like how I feel with Family Guy, it used to be a smaller scale series that got little or no recognition, and then it became so popular it's all they were about. Other than Rugrats, they never had a cartoon so successful it was still running 10 years later. Even their more successful cartoons they wind up sliding to the side. But it is indeed a cash cow. And it really should find it's ending soon. Plus, they GOTTA have more up their sleeves... I hear rumors of a FOP movie... but those are so rumory, I'm not going to look into them.
That said, AAAH Real Monsters and Angry beavers are both UNDERrated.
Most shows on Disney Channel, more importantly, Hannah Montana and Jonas. Again, they're cashcows and Disney will milk them bone dry, much to the dismay of classic Disney fans like myself. The only reason I'm not giving the Mouse House the one finger salute is because they own the Muppets and have been treating them well.
I wasn't going to say anything or even bring them up. I find the shows not only overrated, but they were so overrated that they sent shockwaves through the children's television industry basically saying, "Hey Kids! Cartoons are for kids! You're no longer kids... you're rushing to be grown ups. Now watch these incredibly juvenile sitcoms like grown ups would." Hanna Montana is the reason Cartoon Network doesn't want to run cartoons anymore. I personally hate the shows, but others do enjoy it unfortunately. They have the right to exist, sure... not the right to basically Wal*Mart the competition to death. Again, CN turned into a junk channel of terrible movies, Funimation was screwed out of letting their One Piece dub (and there was such drama about them getting it... I don't even blame 4Kids. It was all Toei's fault), Chowder and the rest got early pink slips... now they want MORE live action trash on the network? FEH!