I like single player more, and I've picked up some games with great online experience just for the single player (Uncharted 2 comes to mind, only played like 1-2 hours of multiplayer), and would probably rejoice if the focus on game developing went into only single player.
But it depends on the games, I've been playing Modnation Racers for the past 3 days and I hate how unstable their servers are because I just love the multiplayer on it. It's probably the only game in the last ~2 years where I actually gave a crap about multiplayer tho.