Smash Up: Best expansions?

[Vael]

I've become a fan of Smash Up, so I'm going to be getting my own copy of the game. And while I will probably get most of the expansions eventually ... I want to start with just one. So, which one would people recommend? I've played with Awesome Level 9000, so I'm tempted to get one of the other ones first.

 

[TwoSix]

Awesome Level 9000 is great, although Ghosts are a bit weird, and not a real favorite with the people I play with. Not as big of a fan of the Cthulhu expansion, didn't enjoy the Madness cards as a general mechanic.