My husband and I love playing board games, but haven't found many we love playing just the two of us. Most of the games that CAN play 2 are much less interesting this way.
Some favorites we own and enjoy playing (with groups) are: 7 Wonders, Agricola, Ticket to Ride, Acquire, Risk, Communi, Dominion, Lords of Waterdeep, Power Grid, Citadels, and Hanabi.
Agricola is the one game we frequently play with the two of us, though my husband thinks it's way better with more people. I like Dominion with 2, but he finds it boring without more people. He enjoys playing Summoner Wars and innovation (with two) but I'm not super into either.
Can anyone suggest games that are explicitly for 2 people OR can play more but are still interesting & challenging with two? The harder/more involved, the better - we're less likely to get bored after playing a few times.