alright ummmmm my answer would usually be jeanmarco but I think anda want a lebih canon couple maybe? Soooooo Goto and Hazama from samurai flamenco. ^^
Hmm, Kirito and Asuna may be "becoming" my all time favorite. Haven't finished the tampil yet, so it's hard to compare with the classics, like Keichi and Belldandy atau Maka and Usui.