There is also the age issue. I think Go is a more interesting game than chess but the scoring is a little hard to teach and it hasn't captured my children's interest as much as chess. Backgammon is interesting - been wondering about teaching it to my children as a counterpoint to chess. Not sure if mine (9 and 11) are quite ready for all the bidding conventions in bridge but working up to it with whist. Poker is very educational I think - I learned lots from playing it - but not really sure whether it would work as a family game.