I'm 44, and watch The Simpsons, The Batman, the new Legion of Super Heroes cartoon, Johnny Test, and Justice League Unlimited. I will also watch Spongebob Squarepants once in a while if I'm in a whimsical mood.
I also used to watch the older Batman and Superman animated series (the ones from WB 10 years ago), and in fact recently picked up the entire Superman animated series on DVD. I also have, in my movie collection, both Toy Story movies, both Shrek movies, Ice Age, and A Bug's Life. And on the list of movies I have the DVD-by-mail rental service (a Canadian equivalent to Netflix), I have Over The Hedge, The Emperor's New Groove, Ice Age 2, Wallace & Grommit: Curse of the Were-Rabbit, Brother Bear, and Cars.
(I also watch South Park, but I don't count that since that's not a cartoon for kids...)
_________________
"Some mornings it's just not worth chewing through the leather straps." -- Emo Philips