We started to sleep separately last year due to work schedules. My wife gets up shortly after I go to bed, so she sleeps in the 2nd bedroom. Its perfect since I like to watch tv, surf the web, eat, etc. and she can sleep undisturbed. On the weekends we sleep together which is nice. We need a bigger bed though, what once was "cozy" seems cramped after sleeping alone during the week. If the subject ever comes up, I always feel like I have to explain that NO we're not having marital problems it just works out better for us.