What constitutes a diverse yet balanced planet mix per star system? On the one hand, a system map with over 100 colonizable gravity wells orbiting one star is unrealistic. On the other hand, our solar system has only eight planets, yet has at least five dwarf planets.
My Map Designer setup is as follows, each planetary body being more distant from the star than the last:
A. 10 Stars (with the setup below per star)
01. Pirate Base
02. Volcanic Planet
03. Greenhouse Planet
04. Greenhouse Planet
05. Greenhouse Planet
06. Oceanic Planet (like GJ 1214 b, closer to its star than Earth to the sun)
07. Terran Planet
08. Desert Planet (like Mars, but could also be placed closer to the star, according to a 2011 study)
09. Ferrous Planet
10. Ice Planet
11. Ice Planet
12. Ice Planet (hopefully a future DLC will include colonizable ice giants, or "mini-Neptunes")
13. Barren Planet
14. Barren Planet
15. Dwarf Planet
(Plus the three starting planets for each player added to the map)
Admittedly, I didn't include gas giants, asteroid belts, or other uncolonizable gravity wells.