You play your character and it isn't right to step out of it. You have to stay in that character.
I tend to follow a very nocturnal sort of existence mainly because I don't much care for sunlight. Bright colors of any kind depress me, in fact. And my moods are more or less inversely related to the clarity of the sky, on any given day. . . . my private motto has always been that behind every silver lining there is a cloud.