It's also the milestones for me. Lately I've started playing RSS a bit more because it's now much more stable I think. The first Orbit in RSS was really a good feeling and because I only play RP-0 career it was much harder. Now things are happening much faster, the first (unmanned) moon landing and Mars flyby were really great. Now that I figured out how to get to orbit in RSS it's really fun to play because I don't fail as often.