I absolutely miss the Spielberg produced cartoons like Tiny Toons, Freakazoid, and especially Animaniacs (I'm like the only person who can recite all the US presidents thanks to this show). However the wonders of DVDs allows me to go back and watch full seasons of awesomeness.
Cartoon Network was at its PRIME during the Cartoon Cartoon "era." You had Dexter, PPG, Cow+Chicken, Ed*3, Time Squad, Courage, and Grim. Sadly Foster's Home can't be included in the list despite being one of the best shows ever. All these great shows, plus you had the Groovies. Awesome points if you remember those. Then to wrap it all up, you could get your anime fix with Toonami! (pre-Naruto, of course)
And then of course you have the days when Fox Kids was not only on, but *gasp* go? Batman, Beetlejuice, Beast Wars, Eek, SAM AND MAX, and X-Men? Ya, you can't beat that.