I love the Rugrats, Hey Arnold, Aaaah! Real Monsters but my top 3 are:
3. Ren and Stimpy - quite possibly the most disgustingly hilarious cartoon ever. Remember the Lummix?
2. Rocko's Modern Life
1. Doug.
I easily couldve gone with Rocko as my favorite but thats an easy choice since a lot of people love that show. But Doug actually did something cartoons didnt do and that was teach lessons. Here was Doug, this 12 year old who has problems fitting in, dealing with bullies, social problems, and basic stuff that a lot of people went through when we were young. And Doug, which obviously was a cartoon, had a more realistic school atmosphere than most crappy kids shows like Lizze Mcguire and Thats so raven or Romeo where all kids are looking for dates no matter how old they are. I felt Doug was underrated even tho I know a lot of people who love that show.
Plus there were great characters like Skeeter, Mr Dink, Porkchop, The Beets, and his alter egos Quailman, Race Canyon, and Smash Adams.