Diassociated Personality Disorder
You're quiet, helpless and utterly insane. You don't wish anyone harm, but on the inside you secretly sharpen your killing tools everyday. Likely to lose control and kill on impulse leaving one hell of a mess. Bad news is your obviously bat**** crazy and it won't take that long for someone to notice. Good news, you're obviously bat**** crazy so you'll be out in 5-10 years.
Ironically I do love the Norman Bates character as well.