Hehe, trapped in your inspirations and by your aspirations it seems; I think you're too fixated on not following established ship designs (or certain aspects) that you're not looking at inspiration, references etc as a precaution to try and insulate yourself from outside influence. What you need to do is look at as much inspiration as possible, and decide for yourself how you want your ship to look and what elements you want to use. Sure you'll end up largely remixing existing ideas and conventions, but if you also use realworld influences as well as obscure fiction, you'll end up with something that is both partially original and not breaking boundaries too much as to make people dislike it.
There's also the function vs form debate; as long as both are given enough consideration, it doesn't really matter which gets priority. It also helps that if you go the function above form route, that the function makes sense.