My preference is animes in general, although if you really liked a non japanese cartoon that's alright too :-)
Right now, I'm watching the ongoing series Psycho Pass
, which I'm finding to be quite good.
I'm also watching Rosario + Vampire
, but I'm not sure how much longer I'll be doing that; someone online said it wasn't the best and I'm wondering if maybe he's right. I really liked it at first but I'm now on episode 10. Maybe I'll finish off the first season, not sure about the second.
Before these 2, I saw Phantom: Requiem for the Phantom
. I've now put that as my second favourite anime, right after St. Luminous Mission High School
(If you've never heard of that anime, don't worry, I don't think most people have :-p). It really moved me, although was frequently pretty depressing; wanted to watch something warm and fluffy after that which is kind of why I got into Rosaria Vampire I think :-p.