When it comes to planets, I expect to be able to do anything from make it a huge resource collection/and food growing planet, to a mega economic center, to an enormous trade market for dozend of other planets resources to move through, to making the planet one giant shipyard, or make some desolate and inhospitable planet a storage area for my resources that are not in use, to making the planet a giant fortress with enough defences to wipe out even a major attack fleet. Depanding on what the planet is like (inhospitable, tons of minable resources, few resources and poor soil, very fertils soiled planet, exc.) I will make a plan as to what the planet will become. I expect planets to be diverse, star systems to be diverse, space to be diverse, and what I can do with a planet to be diverse.
I hope that in Sins, space is not empty. There are more than just earth-like planets. Planets range from hot barren wastelands, to super sized gas planets (with and without rings!!! I havent seen a single gas planet or planet with rings, or moons in game at all), to desolate frozen bodies, all with the potential of moons (ehem).Then theres comets, asteroids, space dusts, ice clouds, supernovas, black holes, nebulae, binary (or more) star systems, and space wreckage. Keep in mind that just because you blow up a ship, doesn't mean that its gone, and has the potential to become hazards. Space wreckage still has gravity, as does any nearby planets. When a large battle has taken place near a planet, the wreckage will do one of three things. It will orbit the planet, it will drift from the planet, or it will bombard the planet. If it drifts, it will eventually become part of asteroids. If it orbits, it will form a ring around the planet, and possibly over time, a new moon for the planet. If it falls to the planet, it will damage and destroy structures (and make a really neat light show). Of course you could gather and re-use the wreckage, for planets are not the only possible place for exploiting. Almost everything I mentioned above could be mined in some way. Wow I just said alot. At 3:21 AM.
Ah! But my ideas are too ambitious. Not everything I hope for will be in the game

(if any, although I do hope some of the above is put in)