>>101756696Kind of an odd question, since anime tends to vary wildly in art and writing quality. There's a big difference between something like Pokemon and something like Evangelion.
Assuming you mean high quality stuff though:
Batman The Animated Series
Reboot (not so much season 1)
Avatar
TMNT 2003
Gargoyles
Spawn (not for kids)
The Maxx (also not for kids)
Castlevania looks really good, but whether the writing quality is good is debatable.
I heard Trollhunters is pretty good, but haven't seen it. This is all assuming this isn't an actual bait thread.