Kazehaya x Sawako(Kimi ni Todoke) - I'd love to be in a relationship like their's, it's realistic and romantic at once
Sano x Yukino(Kare Kano) - words can't describe how I feel about them
Every single couple in Fruits Basket - not one of them I disliked.
Makoto x Megumi(Day of Revolution) - most unconventional couple in shoujo
Takami x Akira(Venus Caprricio) - childhood friends in love at it's best
Momiji x Mantel-Kun(Cat Street)
Keito x Kouichi(Cat Street)
Ginta x Arimi, Kei x Suzu(Marmalade Boy)
Every couple in Special A
obviously there are more, but these are the ones that really make me smile