When I'm looking for a girl, I try to aim for Personality, Loyalty and then Beauty (in that order). I'm not fussed about looks really, but then again, it's really a personal opinion.
For me, I haven't really loved someone yet (I'm only 16), but I have only really like-liked this one girl, who funny enough, has everything I mentioned above. I was only about 2 weeks before I started liking her more then a freind, but once again, it depends on the person.