Well I hope the nights are dark as in realistic Dark, and not that weird bluey night-time that was in Red Dead where it might as well of been day-time. Minecraft to me gets night-time spot on in terms of darkness. It would add to the enemy encounters at night.
Defending villages would be quite fun, especially a village that is bordering a graveyard/crypt/tomb. Occasional recurring assaults from the undead. With a quest to end it permanently of course for those who do not want the responsibility of defending it regularly.