What goes on in your mind?
Most Helpful Guy
For me how a girl looks in my eyes plays a strong role in attraction, along with other sensory inputs like touch, smell, sound of her voice, etc.
When I fall for a girl, I have a striking image in mind of her in my imagination that largely contributes to her "character".
That said, I don't think beauty is so temporary *once* I fall for a girl. For example, my wife has aged in the course of 9 years of being together but I tend to see her the same way as I did originally. That's not with a blind eye towards some signs of aging, but it doesn't break that symbolic image of her character that I fell for in the first place.
Most Helpful Girl
Obviously you have your youthful textbook beautiful that everyone can agree on for the most part, but I think so many other people can be beautiful as well, and that comes from inside. Some people just have this vibe, glow, energy, I don't know, just spirit about them that is fun and beautiful. I prefer that over a textbook beautiful version any day.