Fox is the classical listener, definitely..
I'd take Sasha as a fan of pop, but she has a rather varied taste in it.
Rex loves Christmas music. He would play it year round if he could.
Bino, obviously, only listens to songs about conquering or overcoming obstacles. Doesn't matter the genre.
Grape is more of a jazz fan if you ask me. Classical or smooth, none of that freeform stuff.
Peanut likes weird Al, but he also listens to a lot of U2 surprisingly. Also any song about unrequited love.
Joey listens to Indie rock and anime soundtracks.
Fido doesn't really listen to music, but he is always willing to try something new out. Because of this, he has an eclectic musical taste. He likes songs, not artists or genres.
Everyone likes the Beatles. It is the only band that everyone will listen to.