Same here. I carefully plan my bill paying schedule so as to never go below zero in my checking account. Sometimes that involves deferring payments until the next paycheck. With AutoPay I give up that ability to schedule exactly when the money goes out.
Additionally, I like to review every bill I pay to make sure it makes sense. I've had to dispute bills in the past that were unexplainably incorrect by $10, $20, sometimes close to $50, and if I had them on AutoPay I probably wouldn't have even noticed it.