Sorry for the strange (and somewhat vague) poll-ish thing, but I really can't decide, and I would love your opinion.

Which sounds better as, like, a theme (if I can even call it that)?

-Halloweeny, sort of creepy-lookin'.
-Ancient Japanese mythology-based.
-A fictional aquatic community of human-like creatues.
-something with a lot of vibrant colors.

Other suggestions would be welcome, I guess, but without all the details, it'd probably be difficult to suggest a suitable theme. They're details that won't be disclosed as of yet, so I won't tell you more.