You remember when you are in your space ship and theres the background (planet's,meteorites) ? so I thought of an idea - maybe there should be like other player space ships being seen in the background to if he parked his ship in that planet (I meant like left it in that space part) and also maybe you could see npc ships too . To enter a person's ship a warning should apear to him/her and you "Would you like to battle this person?" or if you are in a group then it would send "would you like to visit this ship?" . Just thought it would be cool. space ships that I used for my concept background - http://dreamingxashley.deviantart.com/art/A-Starbound-Spaceship-WiP-420516529 ) here is one of a really badly made concepts of mine xD
One of the things i would like to see most put into the game are, as you said, npc ships, maybe ship combat.
That would be cool. They could even invade random worlds, or have random races traveling to different worlds, so it doesn't seem like you are the only one traveling.