Who or what I would dress up as if Halloween was big in my country?

I always wanted to be Alice in Wonderland but the costumes would probably either be too slutty or too childish. So I rather dress up as a 'cereal killer' because I love costumes that are cheesy and funny.

And to my future boyfriend, if you love me enough, you would dress up as my Cosmo while I'll be your Wanda from The Fairly OddParents.

And my future family would have to dress up like this because I want to be Princess Bubblegum from Adventure Time for a day/night.