From glitterboy1 originally, then several others, the shortest personality test -- and a surprisingly accurate one for its extreme brevity going by the results I've seen so far.
You are dependable, popular, and observant.
Deep and thoughtful, you are prone to moodiness.
In fact, your emotions tend to influence everything you do.
You are unique, creative, and expressive.
You don't mind waving your freak flag every once and a while.
And lucky for you, most people find your weird ways charming!
I'm not sure about the first and last sentences but the rest's fairly right.
Note: the link they provide is wrong; I had to fix it.