Being a new parent, I've found the pick-up-and-play shooter games are easier to play and enjoy. Single player of course! "Hold on the baby's crying," is too embarrasing an excuse to leave or hold up a multiplayer group. Not because of age or parental status or anything like that, but because it smacks of neglect (whether or not it's true)!
Gone are the 18-hour marathon MMORPG sessions! Well at least until the kid's old enough to type.