Who prefers a human-centric campaign?

[Glyfair]

Not everyone.

I know you are likely just joking around, but yes, everyone. Everyone playing the game is human, thus they relate to humans best.

Now, they may not prefer to play humans. They may even hate playing humans. However, being human they must relate to human. In fact, the players haven't even met any of the other races they might play.

 

[Aeolius]

In fact, the players haven't even met any of the other races they might play.

Unless you play an octopus in my game.