I think that a big part why the vanilla private server became so popular was because of the personal feeling and cooperation between people.
I believe this create bonds and experiences that the present Wow cant offer. The cross server addition have removed the most essential part of, at least whay I consider, the best part of my game experience. Finding online friends, working together, getting rivals as well as enemies you continue to meet on the opposite side and making connections with other people.
At the moment people do not,for most of the times, even talk to eachother. When doing a dungeon for example. There is no need to. You will most likely never meet the person again so why make the effort to get to know anyone?
Yes the bg queues was a pain for one, but in my opinion it was still worth it.
what do you think?, have cross server destroyed part of your wow experience? Do you think it should be removed?