I have to click with a mom. I have a certain intuition about people when I meet them. I'm not psychic, but I read people very well. It's sometimes is difficult for me, especially around negative people, energies, and if others are tense or I just know do not want to talk to me. I get very uncomfortable.
I have actually made a very close friend on this site. I had asked a question about finding moms in my area for a playdate. I met two, one just didn't click, the other, we hit it off right away. It's been close to 5 years now.
It's easier for me having a child. Especially around people I don't know. I had went to a baby shower recently for a friend, and I only knew her and her MIL. I had to talk to other people, obviously, but having a child , and talking with other women who also have children is very helpful. We all share our stories, and it can definetly be a great ice breaker!
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I think for me, meeting a person, it helps if they also initiate conversation or ask general questions ( no personal ones right away) it's a good indicator. Other times for me, a person who has a sense of humour is always a good sign. Someone who can make fun of themselves, and are not so serious. People who load all of their personal baggage, is very draining, and not a good sign for a healthy friendship. This will just turn into a therapy session-one after the other. Or constantly asking for favors.
My main indicator are women who look me up and down. I hate it when they look at my clothes, looks, and how I do things, or what car I drive. I do not like being on the spotlight, or microscope. People like this are never happy, and can be very judgemental.
For me, it's all in the eyes. The eyes are truly the windows of people's souls. Smiling with teeth, showing warmth, and kindness all are indicators of a good friend.