From what I've read, it seems like the player uses his/her own personality - part of the game is decorating your house and dressing your character however you want to. So, I guess the character is who you want them to be. Along with that, however, you are playing as someone who apparently has some dark secret past that unfolds over the course of eight "episodes"? So I guess the character's history/story is enforced?
Seems...different. But, for $14.99 at Best Buy, how can you go wrong? And I even have $5 off at Best Buy! Wheeee. I am totally going to, in the words of Fergie, check it ooout.