I'm enormously analytical and observant, sometimes to a crippling point. I walk by people on the street and I notice every little thing - the way a girl in a group would actively shy away from a guy in the same group, a man's nervous tics, the way a guy subtly puts his arm around his friend.

Everything. I notice it all.

So how do I translate this to cold reading? What part of a person should I remark upon? Should I tell a girl 'Hey, I noticed that you get really nervous when you walk past a large group of people'?

I have to say, most of what I observe about people is negative things, ie their insecurities and nervous tics etc. Should I share that?