During our December vacation, a friend introduced me to the Dominion card game.
It's a great game for my family. My wife and I always appreciate finding another two-play game with very little competition, since my wife does not enjoy trying to "hurt" me even in a game. Dominion is a great example because its "competitive shopping" theme is not at all a zero-sum situation.
I got the special Amazon three-in-one set (which was substantially less expensive at the end of December).
I have also found out that the game can be played for free online. Moreover, that site also allows downloading an archive of old games, but understanding them will probably require using a website with all the card descriptions.