I prefer personal bedrooms. I like to design my fortress for happiness, security, and for when the economy gets kicked in later. So I have a number of designs I'm ready to employ for variable residents, but for the time being only use my middle class and noble housing. Noble housing changes often, I have yet to settle on a design I like.
My middle class housing is a 3x3 unit, complete with a bed, cabinet, and chest.
╔═══╗┼┼╔═══╦═══╗┼┼╔═══╗┼O┼╔═══╗┼┼╔═══╦═══╗┼┼╔═══╗
║ ║++║ ║ ║++║ ║+++║ ║++║ ║ ║++║ ║
║ ┼++┼ ║ ┼++┼ ║+++║ ┼++┼ ║ ┼++┼ ║
║ ║++║ ║ ║++║ ║+++║ ║++║ ║ ║++║ ║
╠═══╣++╠═══╬═══╣++╠═══╣+++╠═══╣++╠═══╬═══╣++╠═══╣
║ ║++║ ║ ║++║ ║+++║ ║++║ ║ ║++║ ║
║ ┼++┼ ║ ┼++┼ ║+++║ ┼++┼ ║ ┼++┼ ║
║ ║++║ ║ ║++║ ║+++║ ║++║ ║ ║++║ ║
╠═══╣++╠═══╬═══╣++╠═══╣+++╠═══╣++╠═══╬═══╣++╠═══╣
║ ║++║ ║ ║++║ ║+++║ ║++║ ║ ║++║ ║
║ ┼++┼ ║ ┼++┼ ║+++║ ┼++┼ ║ ┼++┼ ║
║ ║++║ ║ ║++║ ║+++║ ║++║ ║ ║++║ ║
╠═══╣++╠═══╬═══╣++╠═══╣+++╠═══╣++╠═══╬═══╣++╠═══╣
║ ║++║ ║ ║++║ ║+++║ ║++║ ║ ║++║ ║
║ ┼++┼ ║ ┼++┼ ║+++║ ┼++┼ ║ ┼++┼ ║
║ ║++║ ║ ║++║ ║+++║ ║++║ ║ ║++║ ║
╠═══╣++╠═══╬═══╣++╠═══╣+++╠═══╣++╠═══╬═══╣++╠═══╣
║ ║++║ ║ ║++║ ║+++║ ║++║ ║ ║++║ ║
║ ┼++┼ ║ ┼++┼ ║+++║ ┼++┼ ║ ┼++┼ ║
║ ║++║ ║ ║++║ ║+++║ ║++║ ║ ║++║ ║
╚═══╝┼┼╚═══╩═══╝┼┼╚═══╝┼O┼╚═══╝┼┼╚═══╩═══╝┼┼╚═══╝
++++++++++++++++++++++┼X+X┼++++++++++++++++++++++
++++++++++++++++++++++O+++O++++++++++++++++++++++
++++++++++++++++++++++┼X+X┼++++++++++++++++++++++
╔═══╗┼┼╔═══╦═══╗++╔═══╗┼O┼╔═══╗┼┼╔═══╦═══╗┼┼╔═══╗
║ ║++║ ║ ║++║ ║+++║ ║++║ ║ ║++║ ║
║ ┼++┼ ║ ┼++┼ ║+++║ ┼++┼ ║ ┼++┼ ║
║ ║++║ ║ ║++║ ║+++║ ║++║ ║ ║++║ ║
╠═══╣++╠═══╬═══╣++╠═══╣+++╠═══╣++╠═══╬═══╣++╠═══╣
║ ║++║ ║ ║++║ ║+++║ ║++║ ║ ║++║ ║
║ ┼++┼ ║ ┼++┼ ║+++║ ┼++┼ ║ ┼++┼ ║
║ ║++║ ║ ║++║ ║+++║ ║++║ ║ ║++║ ║
╠═══╣++╠═══╬═══╣++╠═══╣+++╠═══╣++╠═══╬═══╣++╠═══╣
║ ║++║ ║ ║++║ ║+++║ ║++║ ║ ║++║ ║
║ ┼++┼ ║ ┼++┼ ║+++║ ┼++┼ ║ ┼++┼ ║
║ ║++║ ║ ║++║ ║+++║ ║++║ ║ ║++║ ║
╠═══╣++╠═══╬═══╣++╠═══╣+++╠═══╣++╠═══╬═══╣++╠═══╣
║ ║++║ ║ ║++║ ║+++║ ║++║ ║ ║++║ ║
║ ┼++┼ ║ ┼++┼ ║+++║ ┼++┼ ║ ┼++┼ ║
║ ║++║ ║ ║++║ ║+++║ ║++║ ║ ║++║ ║
╠═══╣++╠═══╬═══╣++╠═══╣+++╠═══╣++╠═══╬═══╣++╠═══╣
║ ║++║ ║ ║++║ ║+++║ ║++║ ║ ║++║ ║
║ ┼++┼ ║ ┼++┼ ║+++║ ┼++┼ ║ ┼++┼ ║
║ ║++║ ║ ║++║ ║+++║ ║++║ ║ ║++║ ║
╚═══╝┼┼╚═══╩═══╝┼┼╚═══╝┼O┼╚═══╝┼┼╚═══╩═══╝┼┼╚═══╝
*************************************************
* Legend *
*************************************************
* *
* ' ' = room *
* '+' = floor *
* '┼' = door *
* 'X' = staircase *
* 'O' = column *
* '║' = wall *
* *
*************************************************
This design tiles well, although it takes up a lot of room, and isn't optimized. Most of the doors are optional, but I can lock down any section with ease.
... I've placed 2400 doors so far in my Fort, a decision I have not regretted. Yet.
Someone dies in their sleep, gets reanimated, and is no longer in their bedroom? Lock-down the corridor. Worst case, sacrifice 9 lives rather than the whole fort. Hopefully the legendary dining hall and masterwork roasts can keep the populace happy enough to curtail a tantrum spiral. Average case, few dwarves are in the area, most of those that are are in their room which I can lock to keep them safe, losing maybe 2 out of 9.
Of course there is debate about how useful the containers are. They aren't, but I typically include them for the idea of it.