Let’s be honest: Sometimes we might play games other than MMOs. Treason, I know, but that’s also what’s called being “well-rounded” and “a gamer geek.” I actually think it’s very healthy to have a wider gaming portfolio because it helps you gain a greater perspective on our hobby and our art.
And I’m sure that many of us have enjoyed single-player or limited-multiplayer games that have some really great features. Since the wider games industry seems happy to liberally borrow from MMO design, why not the other way around? What features from single-player games would do well if transplanted into a massively multiplayer setting?