My boyfriend and I have a few friends we play with regularly. We own both seafarers and cities and knights. Those that know that game seafarers is an absolute must. It adds some additional variation to the game without making it more complicated. That is the version we play the most.
As for cities and knights, I enjoy the mechanics, but turns take absolutely forever. There is so much more that needs to be considered every turn it starts to get pretty boring. If anyone has some suggestions for speeding up or improving gameplay, I’d love to hear it!