Consciously or subconsciously the first thing a person does is make an assessment of the body language the person is using with their face. Then they make an assessment of their physical attributes or defects. Then they might listen to what they are saying.
Since most people are good at controlling their facial expressions, the tip I would give, which you might use to your advantage, is to look at their entire body language. Which way are their feet pointing? What are their arm...

Consciously or subconsciously the first thing a person does is make an assessment of the body language the person is using with their face. Then they make an assessment of their physical attributes or defects. Then they might listen to what they are saying.
Since most people are good at controlling their facial expressions, the tip I would give, which you might use to your advantage, is to look at their entire body language. Which way are their feet pointing? What are their arms doing? Are they leaning? How far away are they? etc. This might give you a better clue as to how to proceed.

Dude, if i see a girl. I'd look for her boobs and then turn around and look at her butt. Thats coz i'm being honest. Every guy does it.

I look for a bright white smile, if they have that it tells you they look after their teeth and themselves. But having bad teeth doesnt mean you, are bad. Having no, teeth......?

First impressions are not always right. I find this to be true so often, that now, I wait til I know the person a little better. For example, the very first few minutes, when I met my hubby 12 years ago, I did not like him. I thought he was egotistical and that he probably thought he was better than me. Truth was, he was thinking he wouldn't even have a scare of a chance with me! lol. That was the way he carried himself... He says, "I dress and act like the Fonz to hide Richie Cunningham" lol... He's actually ...

First impressions are not always right. I find this to be true so often, that now, I wait til I know the person a little better. For example, the very first few minutes, when I met my hubby 12 years ago, I did not like him. I thought he was egotistical and that he probably thought he was better than me. Truth was, he was thinking he wouldn't even have a scare of a chance with me! lol. That was the way he carried himself... He says, "I dress and act like the Fonz to hide Richie Cunningham" lol... He's actually was a very shy, sweet and caring person.

So, in my opinion, first looks don't mean anything... well... except in dress... in that it shows how well they take care of themselves... lol...