Going back a few years I used to play Maplestory (I know, not the finest MMO out there, but still) I'm sure other MMO's have done this as well, but the inclusion of real time airships to go to the places you wanted to, and having to get there on time or end up missing the airship was a great inclusion. Not only that but it was a rather fun social experience. Because it was real time and because other people would pay for their ticket on that specific airship as well as you you'd have 10 minutes of speaking to a bunch of people all heading to the same place as you.

I'm not sure about you guys, but aside from dungeons and my FC I don't interact frequently with other players in the world. Especially outside of cities.