We sleep in the same room right now, but just after the last kiddo was born, we slept apart for a while. When I'd get up to tend the baby, his snoring was keeping me from getting back to sleep. I was very very very very very tired all the time and very bitter about him being the reason I couldn't get the sleep the baby would allow me to get. It helped A LOT to sleep apart, as I could get some rest and be in a better mood.
Obviously, he still snores, but generally I hit the gym before bed, and I'm quite tired from chasing the kids, so I fall asleep right away and the kids now let me sleep all night, so it's ok.
That was a VERY long tale to say that we have slept apart in the past, and as long as there is a good reason for it and both people see the logic in it, I think it can be an ok thing.