Rugrats and Looney Tunes are top-tier old school. Although you could probably argue about either one of them actually being old school. But they are to me.
I'm a fan of Flapjack and Adventure Time, but not so much Chowder. It'll do in a pinch.
I think if I watched Hey Arnold again today, I'd like it a lot more than when I was younger. And of course, this thread would be awful if there was no mention of Invader Zim.
LCN's favorite cartoons? ANYONE EVEN WATCH THEM ANYMORE BESIDES WALRUS AND ME?
Used to watch Scooby Doo, Tom and Jerry, Beast Wars, Batman Beyond, Spiderman, Johnny Bravo, Courage the Cowardly Dog, Doug, Johnny Bravo, Dexter's Laboratory, and The Grim Adventures of Billy and Mandy.