I keep learning new aspects to the game. For example, I am learning circuits now to manage nuclear processing. The Kovarex process is neat, but I want to keep a few centrifuges running while pulling out the extra uranium.

For the most part, I have been tackling all the basics of Nauvis before I go to other planets. I have been learning trains, train signals, building and managing busses, etc. etc.

I have been to other planets, but there is just more I want to master on Nauvis first. (I have two space platforms and three rocket solos already, but there are just more aspects to this game then I ever thought possible.)