I have many different biases for different reasons. What ultimately makes you chose in the end ? For me, looks have little to do with it, although most of my biases I do find pretty or handsome, for me it's more their overall personality. Vocal ability is tied in a bit, but it's more how they are as a person (at least perceived by variety, and how they preform with fans onstage and to the general public.) How about you?