I find Terraforming Mars to be a very rewarding game. Takes quite a while to get to grips with it, but it's now the most played game in our house. The cards are getting quite grubby.

It gets played roughly every other day, but Richard also plays a lot of solo games. If I'm out for the evening, then he'll fit in several solo games while I'm gone.

We liked the extra map expansions, but Venus was a total loser and we only included it once or twice. Just got Prelude, only played once so far. I think that's going to be a so-so one. The extra corporations are interesting, but because we know the game so well it doesn't take that long to play, so an expansion to speed it up may actually be a minus.