Your primary action in deciding that sort of thing is deciding what the background world is like.

Their general level of technology isn't enough: you have to get into their heads.

The new version of Battlestar Galactica is a case in point.  The background for the series is that for military reasons the technology in use is retro, even more so for the Galactica and its older Vipers.  They came out of a period when humanity was facing a high-tech adversary that could get into computers (after all, the Cylons basically are computers) and networked systems, so the ships are intentionally "lower tech" than the humans are capable of.  And if you're going low tech there are things that work perfectly well that there's no reason to change.  If you are going to use a wired communication system to reduce the risk of interception, then a telepone headset that gives the user some privacy in the conversation is entirely reasonable, even on a spaceship with faster-than-light drive.  It works, there's no reason to change it for something that looks higher-tech just because.

On the other hand if your civilization is like the Federation in Star Trek where high-tech isn't something you're trying to avoid and you can get away with aesthetics then you could have something clean and smooth without a lot of nurnies and pointy bits.  I personally like the Enterprise shown in the Star Trek films from 2 to 6: clean, not too hotel-like, but with little touches like compartments along the corridors that hint at storage spaces and equipment access and other practical things.  It's a practical ship coming from a society that can afford to put in the little extras to make it look nice.

Or you might have a civilization that's reached Clarke's Law level (advanced technology indistinguishable from magic, more or less) where they can afford to go really retro with the technology hidden.  In that case you can get either the super-high tech look (smooth featureless surfaces everywhere) or the super-retro (the control room of a starship that looks like a wood cabin or a Roman villa.

Basically, once you pick your background, your form follows from there.