The p o r n star.
I'd want to play like one of Charlie's angels or maybe Jill valentine in resident evil.
If not them, maybe be princess amidala or Padme in starwars.
Why not a girl? Halle Berry was an NSA agent. If she can do it so can you. :-D
Ramius, Red October.
Dennis the Menace.
The scary little demon girl from The Ring (Samara).