Why do strangers look weird when I first meet them then the more I talk to them and get to know them they look normal/attractive?

Because personality makes the whole person!

Seems you size them up them a bit based on outer appearances and then soften up as you get to know them

As a stranger we evaluate by their outlook as we do not know about their personality. But as we get to know them, we get deeper into them and their outlook is just the surface.

Our soul too has accepted the personality. Our attention is more to the content, the way they speak, make us think feel etc

Because you find out their just as weird as you and now their cool as a turd

You are possibly attracted to personalities!?

That's my guess.