I tune in first to age.

Smile!

Hair I think

Teeth.

Like Senyar, teeth.

I think eyes but I've never really thought about it before.

It's really kind of a gestalt, isn't it? I guess I notice whether they remind me of anyone.

For me, it depends on the gender. For women, I tend to take-in the entirety of their face, because I am really fascinated by the variety of faces women present to the world though their makeup. Once I take that in, I suppose I center on eyes, as that seems to be the area that receives the greatest amount of attention, makeup-wise, and seems to convey a lot about themselves.

For men, I think I tend to check their hands first. I think that's because, when meeting another man, it's pretty much a given we will shake hands, and I get squicked-out by unkempt hands and especially nails. Long nails on a man are especially unnerving to me. One doesn't have to go to a salon to keep your nails neat and tidy. And, there's also the matter of the size of their hands. I'm not blessed with big, burly man-sized mitts, so, if he has big hands, I know I'll have to adjust my grip a bit.

Whether they are more or less than 6'6'' tall.

I seem to notice the way they are carrying themselves: tentative, confident, downcast, aggressive or whatever.

Eyes, I think. Unless there's something otherwise striking about the person, like excessive height. [peers upward at jouke]

Their voice, in particular any accent they may have.

Posture, I think. I notice how people carry themselves, whether they seem confident in their bearing.

Wat do yoe mien bay dat Fig?
Yoer talking about mie arrent yoe?

Chins.