Some people are concerned about the realism of space travel. Personally, I have always been more irritated by the consistent reliability of in-game devices. For instance, why should your spaceship always work properly? It would be much more interesting if every now and then your ship fails to start and then you have to get a tow-ship to take it to an airplane mechanic and then you cant play your game for two-weeks because you are waiting for the replacement parts to arrive and they were outsourced to a colony on Mars and even with plasma-drive technology its still takes two weeks for them to ship the parts over to your mechanic on Earth. You know, things like that...