I use to be that way before I realized that I was using my writing as an escape from my problems, when your being creative and using those parts of the brain, thier is little room for you to meditate on your problems.

I guess one should call it a coping method?

It took me awhile get pass the stage of writing in my anger and what not...If you stick with writing long enough I think you will find a way to overcome your writers block, and write when your feeling good rather than bad.