I'm a big fan of co-sleeping...so is DH because everything is more peaceful. We have a queen sized bed and maybe because DH and I aren't big people there was just enough room for all of us. I would love a king sized bed though... infact our next bed will be a king... I'm already buying king sized sheets in readiness. If our babies were going through tricky periods then we'd often roll a futon out in our bedroom and I'd sleep down there with the baby while DH remained in our bed. When baby finally settled I'd slip back up into our bed, leaving the baby on the futon. That worked REALLY well.