One thing to note is that we don't see the sucky Japanese animes since they fail before they ever reach our shores. Likely there is a similar percentage of american made stuff that fails as there is japanese anime stuff that fails. We just don't see it.

Of course I could be wrong(I haven't tallied up the totals for each side).

Anyways as for those mentioned. I didn't mind teen titans too much. A bit kiddish but those are the people that watch anime*.

*at least here anime is seen as child'ish by all but those who watch it. Personally I like to introduce them to Kimi Ga Nozomu Eien and see them call *that* childish .