the new justice league is one of the coolest things i've ever seen
samurai jack is also -excellent- tv.. it's beyond the mere cartoon genre
spongebob has the power to make me howl with laughter

i spent hours looking up land of the lost websites a couple weeks ago. it began when i saw someone here had called themselves sleestak

my old faves::
g force
thundercats (though snarf ticked me off so much i quit watching it)
loony tunes (which i can't stand now)
the electric company (with morgan freeman!)
charlie brown specials
that movie with 'oblio' - i think it's called 'the point'
johnny quest
tin-tin
secret of nimh
too much stuff to list.. hehe

now i watch these with my kids, and really enjoy them:
blues clues
dora the explorer
stanley
oswald - very nice show
rugrats
hey arnold
little bill
clifford
richard scarry
and my little girl's favorite, spongebob

hehe feline

I don't know the name of my fav cartoon but it is some Italian Gangster pigeons or something (hardly catch it when it comes on I always miss it)

and Rugratz & Casper are some I catch w/ my kids

animaniacs rocked!

Roadrunner and Foghorn Leghorn

Actually, a lot of those old classics are shown regularly on the cartoon network (looney tunes) and boomerang (George of the Jungle/Super Chicken, Pink Panther/AArdvark, Underdog, etc.). I get to watch a bunch now that I've got little kids. Well, I guess I could watch them before I had kids, but this is a good way to rationalize it.

all the Batman animated series. Every last one of them.

You guys bust me up. Grown men watching and enjoying the Batman and Spiderman cartoons.
But I must say after a while, I find myself actually almost enjoying watching George Shrinks, Dora, Thomas and all the kid cartoons. But I wouldn't go as far as watching them by myself though.

we don't let the kids watch the simpsons, even though i love it. my brother-in-law actually lets his kids watch king of the hill and southpark