I'm interested in watching some of them, but I'm not sure where to start. For anime, I feel that everyone interested in shoujo has at least tried Fruits Basket and OHSHC. That's kinda what I mean by basics.
Please only recommend romance. And if it involves a drastic age difference between the main couple, I'm not really interested.
I also didn't like the whole "girl ends up with the guy who was a jerk-face to her in the beginning" thing in Hana Yori Dango, so please don't suggest that one,