It's really hard for me to choose because I like Jazzie's symbol, name and color, but maybe not the red hair. And Hip Hop is a very lovely green that works much nicer with her hair colors, and thus her overall design. She seems softer and not quite so loud, plus the shoe is a great reminder of the time period!
I'm not a fan of Melody in the cartoon, so I'm willing to pass on her toys. :/ I don't like how stuck-up she is... not trying to step on any toes her, but she's just not a favorite.
In the end, I'm gonna have to go with Jazzie because this was the early '90s and they were all about LOUD. I really like this set a lot and wouldn't mind having all of them, including Melody.