What are some generic Halloween costumes that require a mask?

Besides animal costumes, what are some generic/typical costumes that require a mask?What are some generic Halloween costumes that require a mask?
Well, I don't know if your gender.





If you are a girl:


You could be a Venetian girl, delicate dress with a venetian mask.


You could be a super hero.


Marti Gras-esqe





Male,


Super hero,


or anything from Party city. What are some generic Halloween costumes that require a mask?
My friend is going to be a masquerade thingy. Like one of those girls with poofy dresses with those masks. :]
A vampire and a grim reaper.
scream