I think I literally could not be with such a person. That's just wasting 3 hours a day. Not to mention how much that annoys me. I mean like verging on rage. And that's when I hear it from another room.
This is why I still have my alarm set for 4.30am, my wife's got 9 alarms evenly spaced over 45mins. They start at half past 7, luckily I'm well gone and already at work by that time. If I have a day off and she doesn't....I sleep in the living room.