Is this going to be either a coterie or pack.
I have the books for either or.
If the game for kindred is going to be coterie based. I then vote for vampire. To many times games of Vampire has started up with to high expectations in trying to establish the camarilla court and such. Only to fall before even starting or right at the start. I am thinking a campaign based on a coterie where everyone is in it already would work better.
If not a coterie, then I will have to say Werewolf and a pack.