The very first thing is his face. More specifically, the symmetry of the face, the eyes and the nose. Lips, ears and other features are measured differently depending on the guy.
Then I notice his body. I prefer a nice athletic and toned body with nice legs.
Once he approaches me (or I approach him), I notice his voice. A perfect voice would not be too high-itched.
After all of that, I go to the personality. Upon first meeting a guy, I base my judgement on whether or not to try to date him off of the first impression (funny, boring, mean, etc). I tend to go for the funny guy who seems sincere and kind. I am not at all into "bad boy" types.
But if I had two guys who were nearly the same or somehow equal (personality) in my mind, I would break the "tie" based on looks (especially face--not so much body).
well the very first thing is the swag (; or hahah the way they "own" the room. their confidence, essentially. then the physical stuff follows like; smile, eyes, height, body type, style, ect. then the personality stuff after. is he laughing, having a good time, or being an a**hole. I hope this answers your question!
First thing is his smile, then his eyes. You can tell a lot by someones eyes. Some people you can just tell they have a warm heart :) The next thing would be their voice and how they talk . Then it's just if I get the vibe that he is a genuinely nice person or not!
In all... A guy with a great immune system. Which means he'd have a full head of hair, bright eyes, healthy looking physically and etc.. The pigment of the eyes and hair or skin all depends on different girls tastes. So if you're healthy you are hot.