Tom and I have excellent sleeping arrangements. We love bedtime. We don't have a side of the bed so we can always switch it up. We always cuddle so we can be comfortable. And the heat of his body keeps me in a deep sleep all night long. I hear people saying that they can't fall asleep or that they have trouble staying asleep, but not me. Perhaps it's because we've been sleeping together for so long. When we were first married, we both worked graveyards and slept any chance we could get. We've always gone to bed at the same time - together - slowly building up our tolerance for the other's shuffles and shifts.
Of course, now we have the problem of not being able to sleep very well without the other. Last summer when he was in China I would sleep restlessly for a couple hours every night, wake up just in time to rush to class, and then crash for another couple hours before work. I was constantly exhausted. He was only sleeping about 5 hours a night. Luckily he's only gone for a few days this time around. And when he gets home I'm looking forward to a good night's sleep with him so I can catch up on my zzzzzzs.