Vampire knight <--- Real cool plot and lots of twists if thats the sorta thing you like.
Fruits Basket <--- I dont really like this one much it has an okay plot but there's hardly and fighting.
Akagami no Shirayukihime <--- havnt read it but my friends say its good.
Some other good ones i would recomend ...
Bleach
One piece
Dragon ball
Naruto
So on ...