I'm the 12 hour shift - 4 days on 4 days off with each alternite shift being nights routine and have been for the last 3 years. This way I get basically 3 days off going from Night to Day shift then 5 off going from Days to Nights. The problem I find is that coming off nights is a lottery some times I get away with staright home to kip, 4 hours sleep then the worlds OK. I try this another time and it takes me days to get my life back. At least I'm worked as hard as you are all I've got to do is press buttons all night, on my own, which is a real bugger when you live on your own I basically see no-one for 100+ hours fun ain't it.