I just took the The Triadic Enneagram Test and it was scarily accurate.
Fours tend to live in a private world of their own personal ideals.
They are strongly emotional people who react strongly to even little things. In the course of a day, a Four's emotions can jump between extremes. Fours are often concerned with ideal love, longing after a kind of love that they've never experienced outside of the imagination. They also have strong ideals about themselves, which, combined with highly reactive emotions, can lead them to think terribly of themselves. This makes Fours excessively prone to envy, as they see something good in others and berate themselves for not having the same qualities.