Whatever's the most effective for combat. Likely something spherical or boxy as that will allow the most protection and be the most compact/efficient.
I'll enjoy scrapping all of your RP ships for resources, tho.
Judging from this and your other posts you must be fun at parties. Though putting that aside your statement brings up a good point that many games in a similar vein such as Starbase have failed to address, and that is the power of function over form.
In almost all games that allow to build your own ships (Avorion, Emperyion, Starmade, ect.) the player-base quickly devolves in to building battle cubes because they are the most efficient way of combat. However this stifles creativity, not that you seem to be concerned with that. This turns off a lot of new players from getting into the game because they see trailers and screenshots of cool and unique ships only to find out everyone is flying around in death cubes and not doing so puts you at a disadvantage.
The only solution is to either implement "cosmetic" blocks that you can layer over your ship that don't take up power/weight or some way to disincentivize cubes/spheres.
As for the the topic at hand, I'll most likely try to find a certain compromise between more efficient boxy military designs while not looking I'm completely devoid of style. Also a word of warning to everyone reading, if you think most people in this game aren't going to be like Atreties, you're mistaken, put your expectations in check because 9 out 10 times him or someone like him will be there to blow up your "artfully" built ship.