My current project is Legend of Korra. So far I've only seen the first episode, but it looks good.
Hmm... Avatar TLA, Batman TAS, best ever. I haven't really watched that much animated stuff, eastern or western, mostly just stick with checking out shows TVTropes says are good
I remember and Samurai Jack and Justice League were great. Static Shock and Codename KND were fun too, but I never really watched enough to remember whether they were actually good.
I'm staying away from FIM, for now, I don't want to get sucked into it.
I'm sure there's other stuff I've forgotten, too. My, I used quite a few abbreviations up there, didn't I?
Oh yeah, and Pixar. I love Pixar, can't go without mentioning them. Their stuff is incredible.
Edit: how could we all forget the Simpsons?