I hope it is permissable for me to hop in here with a few of my own questions. I've never modded KSP, I prefer to play most of my games as the programmers intended, however the amount of mods available and my computer coming in have started to change my mind. What does MechJeb do? I do youtuber Szyzyg uses it in his games, but it seems to take all the fun out of actually flying the ship, it seems to be designed to fly the ship at the touch of a button. Secondly, are their mods that add planets, cities, ect into KSP, or just rocket parts?