mine are:
(in no particular order)

1. Edward Elric and Roy Mustang (FMA)
2. L and Light (Deathnote)
3. Eyes Ritheford and Kanone Hilbert (spiral)
4. Gin Ichimaru and Sosuke Aizen (Bleach)
5. Yuki Eirie and Suichi (Gravitation)
6. Kurogane Suwa and Fai D Flowright (Tsubasa)
7. Shizuka doumeki and Kimihiro Watanuki (xxxHolic)
8. Shigure and Yuki Sohma (Fruits Basket)
9. Sasuke Uchiha and naruto uzumaki (naruto)
10. Shujin and Moritaka (Bakuman)