Some good tips.A ball with spikes like a Christmas tree ornament. The spikes so it could easily dock with transport, re-supply, shuttles for atmosphere & space, and other ships.
The ball so propulsion could be applied in any direction, as well as retro-rockets, and maneuvering thrusters for gravity and direction.
Other than a Borg type cube, probably the best all around design I can think of.
As far as looks, it would be cheap and look like a Christmas ornament.
I you're going for the dazzle, add wings, (or four), a tail plane (or four), outcropping engines and weapons.
Almost any disc, or cylinder, or two or three off set, reversed, or 90 degree askew model jet planes will do. Cut them in half and glue them back together like a "push me-Pull you.
The sky (space) is the limit.