The last two American toons that I stopped watching were Kung Fu Panda and Teenage Mutant Ninja turtles. They are both well done but like so much on tv they are just products imitating art. Even South Park, which is conceived, written and completely produced a week before it airs.....is just a brand. While each episode is meant to entertain the show as a whole has no meaning, it just goes on and on until its' producers quit or it fails to serve its' purpose...which is to make money. Art is not about money, success is just a byproduct of artwork that is above average or better.
Like every good story most Japanese anime I have seen has a beginning, a middle and an end. The anime has a purpose and once that is fulfilled then the series is over, regardless of its' popularity. Space Dandy is a pretty good example of this. The exceptions would be those anime that are based on an ongoing manga or light novel series, in which case they are merely paying homage to them. Artwork is a finished product.
In America, the land that I love, they rarely pay actual homage to a comicbook, they just use its' name in order to change the story to their liking and make a dollar instead of being true to the original article and trusting to original storylines. Spiderman, X-men, Captain America, Batman, et cetra, et cetra. I am told that one of the reasons that the tv show The Walking Dead is a success is because they stay mostly true to the comic series it is derived from (I wouldn't know, watch the show never read the comic). But mostly, Hollywood just fucks things up. My favorite example of this is Teenage Mutant Ninja Turtles. This whole series was originally based on an independent comic series. Yet the original comic series was dark, bloody, full of expletives and just plain badass. I know, I remember reading it when it first came out (wish I still had some of those comics, they are worth a small mint today).
Another of my favorites, (posted in the torrent section), is Welcome to the NHK. Not all Japanese anime is fantasy or action based. Often they are contemporary dramas and some of them are just excellent.
Okay....you can call me a weeboo now and I will just hang my head and plead the fifth. It isn't really a hobby or anything, for me Japanese anime is just a past-time I enjoy. I can't afford hobbies, I am too poor for that shit.