The morning's gone, all dreamed away

I am a middle-of-the-day person. Most mornings, I manage to pull myself out of bed around 7:20am, stumble about the apartment for a bit and become fully human somewhere about 8:00am (though not a critical thinking human). Generally, barring meetings and interruptions, I am fully ensconced in whatever I'm working on by noon, and tend to lose track of time for 6-7 hours--yesterday I missed a meeting at 1 because I forgot to look at the clock between 12 and 2, but I got alot done. In the evening, I concentrate on catching up with friends, planning for the next day, and non-work related activities until my brain shuts down (approx. 11pm) and I head for bed.
There are the weeks that aren't very productive. Time passes and I have nothing to show for it. I hate those weeks.
And, occassionally, there are mornings when getting up "on time" doesn't happen. My current schedule allows some flexibility in this department, but I worry a bit about "the real world" and a the time to come when other people will expect my clock to reset itself to their needs. For example, when the cat annoys me in the middle of the night (out of hunger or sheer boredom) I pick him up, throw him in the other room and shut the door. Children are not so easily ignored. Husbands are not so quick to forgive just because you feed them. Bosses don't really care when your "productive time" is--the office is only open from such a time to such a time and that is when you have to work.
And I know I'll have to adjust...I'm just not looking forward to it.