I'm a mix of all four, but 70% melancholic, and least Sanguine.
I have Choleric traits because:
I think logically and pragmatically.
I don't readily reveal deep emotions.
I'm stubborn.
I want my friends to be loyal to me.
I have Melancholic traits because:
I spend most of my time alone.
I am a perfectionist only at what I have interest on.
I seek for friends, yet when I'm around people, I often think people find me mistrustful and so I'm disappointed.
Sensing this criticism, others keep their distance from me.
In relationships, I tend to be slow to initiate, cautious, hyper-critical, and pessimistic, but once committed, I can be unwaveringly loyal and self-sacrificing.
I have Phlegmatic traits because:
I am dependable *shot*, polite *shot again*, and even-tempered *shot yet again*.
I feel more comfortable in a small group of friends or even spending a quiet evening relaxing at home.
I am never flashy.
I am patient, and methodical on the job, and can work alone.
I have Sanguine traits because:
I am imaginative.
As quickly as I discover a new hobby or pursuit, I can also lose interest--when it ceases to be engaging.
There, I got an essay, heh.
This is a modification of the original post to include only the traits that I have.
No one will ever ask me about my temperament after this again, lol.