I'm puzzled why some suggest more features for Kerbin such as cities and whatnot. Isn't this a space program? Besides, after playing a flight sim like FSX, you'll realise why some of us never bother with planes or atmospheric flight in KSP, it's very underwhelming. What I want is more detailed and interactable environments. I want to be driving my rover and having to avoid environmental hazards such as rivers, lava, wind, sinkholes and storms. I want my mining rig on Vall to hit a gas pocket that sends it into orbit because I wasn't careful with drilling. Imagine controlling a submersible in an alien ocean under an alien ice shelf/ceiling with your vessel's lamps being the only source of light and having to rely on your sonar and other instruments to navigate the dark depths. Sends shivers of excitement down my spine, man.