What's the first physical feature you notice when you first meet someone?

For me it's teeth. I always notice a persons smile/teeth first. That's probably why I was so attracted to my boyfriend the first time I saw him because he's not the prettiest, straightest, whitest teeth I've ever seen in my life that sometimes I can't even look at him when he smiles or else I get nervous and my face gets red.
I'm sure someone out there probably thought I'd say spleen, but you can't just go cutting people open and taking their spleens the first time you meet them... Gotta wait at least a day or two to be polite < This is a very bad inside joke that only like 3 people still on this site will probably get so just ignore it.