Halloween
 

I say dress as Alice from the madness return that will scare them for sure and win you the cintest

I like the doll idea. Especially if you make it somewhat creepy, and put stitch marks everywhere. Vampires are also always fun.

Doll, it seems much more unique than say a Vampire of Alice in wonderland! You could do some AWESOME make up with Doll too! :D

Steam punk!
No not really, really expensive as hell.
The doll idea is cool, but it kinda ties in with Lolita if you are trying to look for a porcelain doll look.
Cat girls are over done though. x_x
Maybe you can be a zombie nurse. xD
It can be sexy but not slutty.

Do the doll, they have some awesome make up for it and you can wear some cute every day clothes.

A doll does give you a lot of versatility, and you can do some cool things with buttons and stitches.

I think Silent Hill proved that one wrong. (Except the burping ones, that's was just hilarious)

In others news, I'd go with the doll idea, because the vampires is kind of, you know... and the black cat is over used to death (at least where I am).

You can probably do some neat thing with the doll idea, like a really creepy doll that carries a human backpack kinda, like these plushie dolls that are back pack, that would be a nice idea, I don't think I've seen a twist like that on that idea yet. (I don't know if that made sense <.<)

Definitely try to do the Mad Hatter or Alice in Wonderland themed. You can buy some fabric and make it look unique and artsy and paint or buy stockings that have spades, clubs, diamonds or hearts on them and you can kinda dress lolita with an Alice in Wonderland theme. I'd go with being the Mad Hatter though. c: