My flakiness isn't so much from lack of sleep or anything as it is from my medications!!! Prednisone can really make you a total space case if your dosage is high enough, and my 40mg a day is pretty high. I'll be sitting in a restaurant right across the table from my mom and having a conversation about my wedding (which I am a total bridezilla about- yes, it's back on and things are working out!), and then go "huh?" like nothing happened. I do it all the time. I don't hear people, I space out constantly, and I can't remember where I'm driving to- ever.
Of course I'm not as bad as Mr. Bunny, who almost always forgets to put deodorant on in the morning and has to run back into the house. I'm sending one of my bridesmaids to his room the morning of the wedding with a post-it that says "put on deodorant...and socks."