While it would be cool to be a mermaid, I think jazmín is a better option. She's got the Genie, the carpet, three awesome (and most likely trained) animals, she lives in a warm climate, has an awesome wardrobe, and her guy is Aladdin. Who wouldn't want to be jazmín for that alone
In reality, however, I'm like cenicienta before she married into royalty...I doubt that counts for anything though