Though, for the sake of being on topic since Flame of Recca counts, the only stuff I've really been keeping up with that no one else mentioned is Air Gear and Tenjou Tenge but they really aren't the greatest. The art is good though.
Street Fighter > All
Berserk having a Romance core? That's true; but in the same sense that revenge is a core theme of One Piece.
Houshin Engi ? Come on, the flying hippo got married in the end !
Kenshin was alright i guess but i'm more of a tomoe supporter since kaoru felt like such a weakling in the end.
Chrno Crusade. Non-sappy, romance that's not overly spoony, a breath of fresh air really.
Saikano. Speechless, just read it yourself.