I've been complaining about this for years. There's still some out there, but you have to look. My son and I LOVE watching cartoons together. I explained to my kids how Sat. morning used to be a ritual of waking up an hour before you ever could on a school day so you could flop downstairs in your pajamas (with the plastic bottomed feet in them), and start watching cartoons from 6am until noon.
Now, there's nothing but news shows on, and the quality of the few cartoons on network TV is GOD AWFUL. Everything is animae inspired and unwatchable. There was a bright spot in the 1990's on WB for a while (shows like Batman, Superman, Life with Louie, Animaniacs, etc were top notch), but they were all replaced with Power Rangers and Pokemon type shows. Then, not suprisingly, when the schedule was saturated with this junk nobody watched anymore and it was taken off their morning schedule. Now they have info-mercials and lame Holywood news shows.
Cartoon Network has a contract with probably the most brilliant animator in the last 40 years: Gendy Tartovsky He's responsible for Dexter's Labortory, PowerPuff Girls, Samurai Jack (AMAZING), Clone Wars, and Foster's Home for Imaginary Friends. These shows are top notch, well throught out, and were not designed to "Just make money." Much like the Bugs Bunny cartoons of the 40's and 50's, they were designed to entertain. Seek out these shows and you will do well.
Nickeloden's Spongebob Squarepants is actually very funny and well done as well (however, it's become pretty commercial and the quality has gone down in the last couple of years). Jimmy Neutron is not bad either.
The good shows are out there, but there's just not enough of them, and it's really sad because cartoons played a major part in the development of my creativity.