The most exciting opening?

One can make a strong argument for the Botvinnik Variation of the Semi-Slav.  The position after Black's 10th move was first reached by Grünfeld (!) in 1936,  Botvinnik came up with the amazing idea of castling queenside in 1941, and in 2012, I have yet to meet a person who claims to understand what's going on in this crazy opening.