The current regime that I work is terible. We work more hours in the winter than in summer, don't see our family between October and June, but the time off in summer is surposed to make up got this. I can tell you, it does not.
But if you are happy with your current regime, then say so in the survay. Who knows, the powers that be may actually listen to your opinion and suggest that these shifts be adopted. Having worked 4 on 4 off, I would go for this any time. Then again, I also know of many unhappy bunnies who would rether not work shifts at all, and some who would rather not work at all!
In the end, we all have to work; some environments dictate that 4 on 4 off is the best system, and others where a standard 8 hours working is the maximum that most people can tollerate without being so fatigued that they regularly fall asleep at the wheel on the way home.
So please fill in your survay truthfully. We all have nothing to lose by doing this, and everything to gain.
JFD