One thing I haven't seen any topics on is planetary weather or natural disasters. Personally something like this would add a very neat immersion level to the game. You could have actual Seasons were a player would experience a specific type of weather more often than you would at another time (like snow, rain, strong winds, ect.) Additionally, if its primarily a snow or desert planet the dust storms or snow storms could move around on the planet, thus making it (1) difficult to fly, walk, build, ect, (2) physically impossible to land or do anything, and (3) could destroy buildings and other in