Halloweeeeen!

After moping about not having Halloween plans (and finding out some friends were going), I finally bit the bullet and purchased a ticket to go see Neil Gaiman and Amanda Palmer. So yay, I have Halloween plans now!! So the decision is... WHAT COSTUME SHOULD I WEAR?! Please help me choooose! D:

Here are my options:
Death from Sandman
Pros: Really easy costume, fun make up, it's comfortable and I can add a leather jacket to it so I won't be cold.
Cons: I'm sure there are going to be TONS of people dressed up as Death to go see Neil Gaiman on Halloween. It's a given. And honestly, it's not that interesting.

Miss Martian from Young Justice
Pros: It's a VERY fun costume to wear, it's very noticeable, I will be warm, and it's okay on the comfort level.
Cons: It's really not easy being green, like bathroom and stuff. Also, the green face paint is a bit of a challenge to put on. It err, also might be way too nerdy for this venue. xD

Toph from Avatar: The Last Airbender
Pros: Really easy costume to wear, it's super comfortable, going to the bathroom isn't hard, and it's also well made.
Cons: Well, I'll probably be a bit cold. Also, same problem with Miss Martian, it's a bit nerdy. XD

Fiona from Adventure Time
Pros: Easy costume to wear, it has a convenient backpack to hold all of my stuff and it's super easy to put together.
Cons: I haven't made it yet. XD But it's so easy to that it's not that much of a con. It might be a bit nerdy but Adventure Time attracts a fairly hipster crowd as well.