Defintetly a Melancholic.
Whenever I create/draw something, I always feel that there is someone out there who can do better than me, that I should improve on everything about my creation.
In general though I think I'm creative, and I do concentrate on things that depress me, although, most of the time I just bottle them up little by little, and one day just boast them all out.
And I am VERY paticular about what I want. It has to be how I imagined it, it has to be P-E-R-F-E-C-T!