While I generally agree with you Byron I see a few qualifications. The main one is that in Aurora at least jump drives create hard (if artificial) limits on mass. In those terms volume isn't an issue, but mass is. In fact if you're a ship designer with a strict mass limit (to match fleet jump drives) then you're going to have to be very strict on unnecessary items like extra beds that might force you to leave that extra shield generator off the design.
Even on the most constrained of the treaty battleships (built under rules quite similar to the ones you see in Aurora), the SoDaks, they didn't hot bunk during the war, and that was with a lot more crew than they designed for. They did put hammocks everywhere, but there was enough space to avoid the problem. And those ships are seriously cramped. I was rather startled by how small Alabama felt compared to Iowa. They'll find the mass if it improves crew performance enough.
The other is that heavy armor plating in Aurora is quite expensive, and that scales with volume. I suppose the same is true for surface ships but they can at least use belt armor rather full armor, something I don't think you could do on a star ship. So I could see lightly armored carriers having plenty of space for extravagant crew quarters, but a massively armored jump cruiser hot-bunking.
This is more a quirk of the Aurora armor model than anything. If the model was more sophisticated, you could only armor the bits that are important to fighting the ship, not the crew quarters.
(The belt is only part of a battleship armor scheme, and not the most important one by the end of that era. The actual phrase you're looking for is
all-or-nothing armor.)
you could do belt armor on a space ship. You would need to orient yourself so that your armor belt is perpendicular to who is shooting at you. This sucks if you're facing fires from multiple vectors. Though that would suck without Belt armor too.
I'd use 'faceplate armor' to describe that, and expect it will exist in space. Mass is too precious to armor everything. This was also true of battleships (see link above).
I agree resistance isn't necessarily a factor for spaceships, however I'd still expect spaceships to hot-bunk on military ships, at least for the lowest ranking. Besides tradition.
What tradition? Traditionally, submariners hot-bunk, but nobody else does, except maybe on small boats.
Simply put, regardless of how advanced, military ships are going to devote as little cubage and mass as possible to crew in order to devote as much as possible to the rest of the bits that make a warship a warship. Not to say that as miniaturization doesn't improve there isn't room to make it more comfortable, but in order to maximize possible usefulness it is not the highest priority.
This fails the history test. Nobody during the age of treaty battleships (when the British and Americans, at least, were nearly as mass-limited as we are in Aurora) made the crew hot-bunk to save space and weight. Hot-bunking does carry morale penalties, and for everything except submarines, they're just not worth it.
(Also, I personally expect spaceships to be much more automated than Aurora portrays them as, so the cost of crew is pretty low relative to the whole ship.)