But are you sure you don't want it to go into hibernation? Let's say you have to leave your MB untouched for a whole weekend. If you tell it to NOT hibernate at all it will lose everything it had in memory and you have to start from scratch with all your opened apps, tabs, etc. Under my scenario if you leave it untouched for a day it will at least hibernate and save all that stuff. Within a day it will wake up fast, like before.