the weather does dictate the coffee we chose for our day. however, i like to think that people's baseline preference speaks for them. a hot coffee is like warmth and almost purposeful. so i think people who drink hot coffee's are appreciative of classic, timeless things and also they seem so put together/morning people. cold coffee or iced coffee drinkers i think would be more active, adventurous even. an iced coffee could be had at any time and so the people drinking it are usually easy going and flexible...
I could be wrong about all of this though but it's fun to think about.