There are so many reasons that geometry of a space ship matters from pressurization structural stability, acceleration stress, to deflection angle of space debris during travel.

Be more like the Borg. Our space ship is a literal cube. Efficiency!

I love ships that wouldn't work well in atmosphere! They look much cooler! Feel more spacey!

My friend in avorion spent countless hours designing incredibly cool, streamlined ships that had V wings and neatly spinning barbettes for weapons systems. He downloaded the fan-made recreations of popular sci-fi series.

...

I made cubes. I put square stone on top of square metal armor on top of reinforcing blocks, and threw everything into ever-expanding cubes. Once I got the auto-targeting weapons, I WAS the borg. It was beautiful.

Engi freighter always

Me playing avorion.

Fine, it'll be a double walled square.

Save our Ships devs in shambles. Or elated maybe?