my tastes for navy uniforms are a "normal" shirtsleeves dress for duty uniform, with the vac suits being donned as battle stations are sounded (and carried at other times by the person).
think about it, navy personnel do not (for example) wear their lifebelts all day every day, but put them on when they need to for whatever reason. Now, I get that TL15 tailored vac suits are supposed to be more comfortable than wearing a lifebelt, but I think the same principal would apply: people working in, say, the hangers would be in vac suits all the time, but the ships cook can get away with being in his vest can apron, with his vac suit in a grab bag he carries with him and hangs on the wall while he works.