I love the B06 Modern opening for black:

[Title "White - Black"]
[fen "r1bqk2r/1ppnnpb1/p2pp1pp/8/2BPP2B/2N2N2/PPP2PPP/R2Q1RK1 w kq - 1 9"]

1. e4 d6 2. d4 g6 3. Nc3 Bg7 4. Bc4 e6 5. Nf3 Ne7 6. Bg5 h6 7. Bh4 a6 8.O-O Nd7

I find it leads to a strong position for WHITE to attack and a secure one for BLACK to defend (especially if it leads you to the Hippo Defense because, as Black, I've had my greatest success with atypical openings:

[Title "Petrosian vs. Spassky, World Championship 1966 (game 16)"]
[fen "r2q1rk1/1bpnnpbp/pp1pp1p1/8/P2PP3/2PB1N2/1P1N1PPP/R1BQR1K1 w - - 0 11"]

1.d4 g6 2.e4 Bg7 3.Nf3 d6 4.Be2 e6 5.c3 Nd7 6.0-0 Ne7 7.Nbd2 b6 8.a4 a6 9.Re1 Bb7 10.Bd3 0-0

Question: To help disadvantage WHITE what other openings have people found to be largely successful in leaving BLACK is a strong position?