My favourite board game was and still is the chess. I have checked many other board games, however I didn´t find one would be a match for this king of board games.
I'd say Chess and Monopoly. At one point I got hooked on playing Monopoly online, but was losing a lot, so I've read several books about it and learned to play pretty well.. good times
Monopoly. It always ends in tears and bloodshed though, don't think I've ever made it through a game without cheating : )