As a kid... Hmm...
Rocko's Modern Life, Rugrats, and Dexter's Laboratory, later Spongebob Squarepants, Angry Beavers, and Ed, Edd, n Eddy.
90s cartoons. The best era of anything, ever (and don't you deny it!)
Now...
Rugrats (still), Adventure Time (best television show ever), Neon Genesis Evangelion (Are we counting anime? Anyway, second best television show ever), and I just got introduced to this little thing called The Powerpuff Girls which if it remains as good as what I've seen so far will easily be competing with the two that come before it...