Something that could add some charm to the game is to have a few things in the background:
In the background I mean the background of the game where you see the stars, and planets, etc - so non interact-able
- Neutral ships flying
- Ships fighting each other
- Falling stars
- Flying asteroids
This came to mind when I was mining in a zone with nebula, when standing still the game had no movement. At one point I thought the game had frozen!