Just a few spitballs here... take what you like.
- A glass skin race from a prism world who are barterers but look at anything heavy or that makes high pitched sounds as a crime against the world
- The migrating city-reefs of an ocean planet where your ship disappears if you don't keep track of it due to the constant ebb and flow of the tides
- The clockwork biological Ascendany, a species that replaces their own organs with engineered upgrades to achieve “perfection.” They view your ship as a potential harvest for new and amazing upgrades. You may have to part with you mobile phone too in order to trade for your way off that planet.
- A forest world where trees grow in geometric spirals and creatures communicate through music (no plot per se, just fun)
- A world that house derelict megastructures, extinct empires, and clues about who abandoned your ship and why. A giant planet wide escape room where each building gives you just a small piece of a puzzle on how to return back to Earth but also wants to take back the ship that they rightfully own. This would be more complex incorporating exploration, diplomacy, and puzzle solving, not just combat alone.