John: John isn't one to judge when it comes to appearances, so when he saw you, he wasn't much fascinated with your looks, but something about you just really made him want to get to know you. And boy, was he glad he did. I guess in this case you can say he fell in love with hiw mysterious you are.
Paul: When Paul met you, he didn't see you at first. His back was turned to you, until you began talking, a sweet pretty voice that sounded like angels singing. And to add to that, when he turned to look at you he could've fainted with the amount of beauty he was overwhelmed with.
George: Much like Paul, he fell in love with how you sounded. He came across you when you were singing a sweet song, and thought it was perfect. Those few seconds felt like heaven.
Ringo: Your face. Upon seeing you, he thought you were the prettiest girl he had ever seen. He claimed you looked so perfect your skin reminded him of porcelain. That's why he happens to reffer to you as 'doll face' when talking to you.