Thanks guys, that was very helpful. I tend to agree with this:
Keano wrote on 02/11/14 at 20:54:50:
I accept this whole plan with ...Bxc3 and 0-0-0 may not be theoretically best, but for me it leads to nice natural play and OTB this is more important for me.
It is attractive that Black's play is similar to 3.exd5 exd5 4.Bd3 Nc6 and castling queenside.
Practice seems to confirm this. Except for Timman losing as Black and winning as White the second player scores well, albeit in not too many games.
1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.exd5 exd5 5.Bd3 Nc6 6.a3 Bxc3+ 7.bxc3 Nge7 8.Qf3 Be6 9.Ne2 Qd7 10.Ng3 O-O-O 11.O-O and now h5 is interesting. Some sample lines which I absolutely haven't scrutinized:
a) 12.h3 h4 13.Nh5 Bf5 14.Nxg7 Bxh3 15.gxh3 Rdg8 16.Qxf7 Nd8 seems to end with a perpetual;
b) 12.h4 f6 13.Rd1 Rdf8 14.Qe2 Bg4 15.f3 Bf5 or 14.Re1 Bg4 15.Qe3 g5 (perhaps Rfg8 first) 16.hxg5 h4.
After 11.h3 Black might sac a pawn with f6 12.O-O h5 or try Rdf8 12.O-O f5 13.Nh5 f4 14.Re1 g5 15.Ng7 Bf5 16.Nxf5 Nxf5.
While I agree with IM Cox that it's silly to whine how boring the Exchange is it remains a valid question how to unbore the variation. It might be a trivial question for titled players, but not for amateurs like me.