I'll start
Halloween Gambit
French Defence (as black).
a varant of the berlin defense and kings gambit.
I hope that made sense ,if you are an expert please correct me!
As white: 1.e4... anything but French or Caro-Kann.
As black: Most continuations of 1.d4 d5, 1.e4 e5.
Grob
The English (King's English, Botvinnik system) as white and the Stonewall Dutch as black. :]
the Giouco Piano as white :)
If I played White I would choose Fried Liver attack
If I played black then I would pray that White played the Grob Opening Fool's Mate variation.
If I was Black then I would play the King's pawn opening.
I just play 1. d4 as white and go along with whatever my opponent chooses.
As black, Caro-Kann in response to 1. e4 and Slav Defense in response to 1. d4
I still like going to Queen's Gambit. Not that I'm any good at it but it is fun to play. :)