That's not part of the definition of obsession! Though... if forced to choose between avoiding the dark and strong emotion, I would succumb to the dark side any day!
Because you've realized the woeful inadequacy of your existence and your mind is trying to compensate by convincing you that this is only because of this "darkness" and is no fault of your own being
Don't take that as me trying to be unkind or anything. I just went through a big "I'm so obsessed with darkness" phase and that's how I've come to perceive it