Both physical and personality traits.. And why..
Most Helpful Guy
Least attractive about...
Woman: deliberately reduces people (men or women) into components, or assets; and deliberately ignore what makes them tick as a person. Example, girl will explain why guy is unattractive based off of characteristics that don't reflect character/are unchangeable.
Men: use thin forms of "strength" (whether it's being aggressive, loud, controlling), to seem in control. Very easy to see through, it's just a drag.
Most attractive about...
Women: laughter, usually the uncontrolled kind, and what she laughs at. If she laughs easily, and finds little things enjoyable, that's the difference between "there's a good looking girl" and "there's a good looking girl i care about". Everyone once in a while, you spend time with a girl, and she'll say something like "you always... xyz", and you realize that she doesn't just spend hours with you, but she's paying attention. It's one of the best feelings to be noticed like that.
Men: Well, speaking for myself, having the kind of strength to put my emotions second if someone is in crisis, needs the attention more. Standing in the middle when no one else will.
Women: Smiles, laughs, stare. Stare is a huge one. There are so many genuinely hot girls who I've sat across a table from and they look lost/distracted/ditzy. And there are girls who you look at them and it's entirely captivating. I can't help it. Oh, and butts >>> boobs. Because no one can control the genes for boobs, but everyone can work out their glutes.
Men: Again, I value in myself being well dressed, walking upright, firm handshake, speak clearly.1