Spewing what's on my mind... Ever notice you can tell a lot about someone by the way they talk on the phone? If they are high-strung and stressful people, they will speak that way on the phone, even if they didn't act that way moments before. Just the opposite, if they are very laid back. I was talking with someone the other day who would hardly let me get a word in, and if I did, it was only a few words. This makes me question if they are a really bad listener. It seems peoples personalities and potential flaws manifest themselves via phone conversations.
Moral of the story is... I seem to have found a backdoor way to knowing if you will get along with someone (a stranger) through phone calls. If you feel comfortable during the conversation without a quizzical look, you'll probably get along great in person. It's like the fast-track to experiencing someones personality.