Honestly all the characters in the game are pretty good and I felt they did a good job making the same worlds interesting for each of them. You should pick it up and try to finish it, especially since everyone plays differently. I think that to me was this game's greatest strength, being able to re-use the same worlds and elements but making it feel like a fresh experience each time. Though Ventus was my favorite character to play, I think Aqua surprised me the most as a playable character and her story is actually my favorite of the three.