If we're just talking about looks i'll prioritize in this order:
face, body overall (fit, normal, thin, skinny, fat etc.) ass, breasts.
A girl with a pretty face and a normal body is better looking than a girl with a great body and huge boobs but an ugly face IMO.
As for what girls i go for... i've usually just gone for those who showed interrest in me, and seen what it led to, unless there was something about them that made made me not want to do anything with them, usually personallity related though.