Yes, it's interesting what you pick up about people through their words & not nothing much else to go by, Roberta. There are some posters, who at some stage, I began to perceive almost as kindred spirits. Bit by bit, quite slowly ... But if I thought about it, I'd be hard-pressed to pin-point what it was they'd actually said, & when, that lead me to initially form that opinion. Like you say, it happens over time.
You know, I've reached the stage where (sometimes) I can predict who the next poster to a particular thread will be ... & what they are about to say (or the gist of it) about a particular topic! Interesting, hey?