No matter how little sleep I get or how restless I am ALWAYS happy and cheerful. Of my four girls only my youngest is like this. My brother and sister are BOTH NASTY in the AM.
I only get cranky later in the afternoon if I feel especially ill and then instead of taking it out on anyone, I let them know that it is not them - it's me, I don't feel well and am tired. If they continue to do shit that would piss me off then I merely drop kick them across the room.....
LOL
I just take power nap and usually that makes all right in the world.