Looks aren't totally subjective, facial symmetry is something that attracts almost all humans to some degree, but they're also some features that people find attractive more often than not. Things like high cheekbones are considered attractive for both sexes ( and lower set cheekbones being considered unattractive to most people), with men tending to gravitate towards women with big, puffy cheeks on top of high cheekbones. Men also tend to like women with rounder jawlines, and women tending to like men with broad faces and square, sharp, and very strong jawlines; I know its weird for jawlines to get so much attention, but it has something to do with jaw shape and size relating to testosterone and aggressiveness or something. There's some other stuff I'm forgetting too I think, I'll post later if I can think of that stuff.