"Can You Judge a Person by His E-Mail Address?"

[Gmail users are] well-traveled, career-focused, tech-savvy agnostics. The site also found that they're partial to "salty snacks" and lounge around their apartments in T-shirts and jeans.

Yahoo users, on the other hand, tend to be overweight women ages 18 to 49, with high-school diplomas, children and a sweet tooth.

Hotmailers are more likely to be suburban women of average build, aged 18 to 34, according to Hunch. They're more likely childless, not religious and pessimistic.

The @AOL crew -- the oldest of the bunch -- tend to put family first, read magazines and live in the suburbs. They likely haven't traveled internationally, but are considered "optimistic extroverts."