In theory hibernation dumps the memory to the drive and allows "almost instant" powerup. I personally don't care for it. It is aimed primarily at laptops and will create a file that is the size of your physical memory that you cant delete. 

I say if you arent having any problems with it and like what it does keep using it.

Should I always hibernate instead of shutting down?
Will the event horizons of a two black holes be perturbed or bent before a collision? What will the shape of the event horizon appear to be immediately after first contact?
