Each of the Princes in Princess Debut has a distinct personality and each interacts different with your character. Of all the Princes whom you can meet in your first game, Vince is the youngest and the most naive in terms of romance. Like many boys in their early teens, his way of expressing an interest in a girl is to play pranks on her. Here are some early encounters with Vince:
My personal favourite is the encounter where he purchases your character a 'Mimic Cookie.' As you can see, choosing the Turtle or Rabbit ends the Event quickly. If, however, you choose the cat, Vince's behaviour is very sweet and he endeavours to please his feline companion until he is utterly 'exhausted' by the exercise.
In my current game, I took Prince Luciano as my partner. Much to my dismay, directly after we gave a dazzling dance performance on 'Founding Day', he received a message from the King of his own land ordering him to return. He could not refuse a royal command, apparently, however much I begged him to stay and I abruptly found myself partnerless!
Part of me wants to remain unattached to see if he returns at the 11th hour to squire me to the Ball. Another part would be interested in exploring partnership with one of the other princes... Klaus perhaps?
My real favourite probably is Liam, but Luciano represented a bit of a challenge early in the game and that was what determined my choice.