I must truly be a fossil if people are now nostalgic for As Told By Ginger. Don't even feel like Dexter's Lab is that old, man time really does fly. I have two nephews who basically live with us so I see lots of kids stuff, "cartoons" and the ilk and what bothers me a lot is that a ton of shows aren't even "cartoons" anymore but use CGI or whatever. No doubt will be becoming more prevalent in the future, still sucks.
Really, I don't even think the classic Nick cartoons are that great. Rugrats 1st season is about all I can take of the show, hate klasky csupo studio stuff, always have, with the exception of Duckman. Ren and Stimpy was really crazy before Nick put pressure on the producers to tone it down. Invader Zim is a classic and I easily hold it over a lot of stuff most people swear by.
Liquid Television was where it was. I get so emotional when I watch youtube videos because I'm transported back to what was for me, a very magical time in the life. I lament old MTV more than I do cartoons in general because even back then 90% of stuff was just to sell toys or to indoctrinate kids. The good stuff that people miss were usually outliers, exceptions to the rule and you're heavily biased if you think otherwise. Its ok to be biased though, I am too! Nostalgia is a very powerful tool.