Panama on 19 April 2012
Depends upon the genre. While fighters recently have attempted to implement meaty single player components, at the end of the day you end up playing the multiplayer without ever looking back.
There's also the personal preference factor, some people get a thrill from competitive gaming that no single player game can replicate. For instance games like DotA/LoL where some individuals rather spend 100s of hours mastering builds and plays for competitive play rather than slaying dragons in Skyrim.
Then there's the games that fall into a grey area like Demons Souls. The online is implemented in such a way that it complements the campaign if anything.
