Just like you'd expect - some are tall, some are short, some have agendas, most don't, some have accents, most don't, some are male, some are not, some are friendly, some keep to themselves, most are fair, some should be avoided, those w/tenure expect to see in the future, most are published, some are Nobel Laureates. They're basically like any group of individuals you'll likely encounter, except they're probably a more intelligent bunch.