You guys have to realize that being emo and having a depressive personality are two totally different things.
Emo is a trend. Emo means "depressed", but it also means having a fringe, hanging out with mallgoths, and listening to mainstream "emo" music.
Someone with a depressive personality means being sad a lot, but they can have any hair style they want, hang out with whoever (or being a loner), and can listen to any music they want.