That's about the exact progression I went through:

• Lots of single-player gaming as a teen
• Tons of single and multiplayer gaming with friends as a young adult
• Cut back on gaming after getting married
• Drastically cut back after having young kids
• Gaming will increase again after kids get older.

I have gotten my wife into gaming over the course of our marriage, so we've played through nearly every Lego game and lots of other light co-op games. We also do some pen and paper RPG gaming, which lets us socialize with our geeky friends and spend time together while 'gaming.' Not quite the same as sitting around the couch playing Mario Kart or Smash Bros, but great in its own right.

I'm planning a post about pen & paper roleplaying in the near future. Its really overlooked IMO.