[Batty]

The American version is much more gory, and sex crazy, and just all around more graphic.

I think thats why people enjoy it more.
The UK version is more of what is was intended to be: Monsters, [or so they think] trying to BE human. A human's life, compared to a vampires, or a were's, is mundane. Its easy. Its not complicated.

The American version incorporates more of their world, more of their struggles, etc. And the only one I've seen thus far even TRY, is Josh. Which is kind of disappointing.