I can't say that animated series of western progeniture are my slice of bread, although I do watch animated feature films from time to time. Here's a few interesting ones I know:
(links to trailers on youtube)
The Secret of Kells - myths and history of the British isles are blended to tell a coming of age tale, with visual and aural grandeur. The unique animation style mimics the simple, yet intricate illuminations of the titular artifact. It's one of my favourite films, animated or not.
The Triplets of Belleville - a really trippy and technically impressive film, with the big drawback of being rather boring. Some really memorable scenes are worth sitting through its overly long run.
Metropia - An Orwellian world and story, reminescent of Terry Gilliam's
Brazil. The visual style is very unsettling, with actors' faces kind of "grafted" onto CGI animated puppets. The story doesn't have much of an impact, though. Or maybe it's just me being too jaded.
Persepolis - Another coming of age story, this time with an Iranian girl at its centre. Mostly kept in black and white, this comic book adaptation is at times observant, darkly humorous and poignant.
Immortal: Ad vitam - (note: the trailer doesn't do it justice) An adaptation of one of Enki Bilal's comic books (which you should check by the way) merging live-acting with CGI animation. Looks jarringly odd at times, but if you can get over this, the film gets quite interesting.
The story concerns... nah, it's too weird and complicated to describe.
Waltz with Bashir - A sort of documentary, concerning the Lebanon War of 1982. It's got a dreamy feel to it, almost nightmarish but not quite, despite being a very realistic depiction of war. Worth seeing.