One of my big beefs with MMOs is that I have friends all around the world and can't play with them. For example, most of Team WoW.com play on US realms, a couple on Oceanic and me and the T in the EU. Of course the biggest problem with playing any MMO will be timezones (especially if you like to raid) but that doesn't stop some titles having just one massive server, regionless servers or allowing you to change realms on the fly. Sadly WoW has none of these and it frustrates me that there's such a divide, even though here in Europe there are cross-language battlegroups and more servers than you can shake a stick at. However given the number of players across the US, EU and China I can understand the reasons for it.
So readers, putting aside region restrictions, logic and languages for a moment, do you wish WoW had just one giant server? Would you like the ability to move from server to server for free at a moment's notice, depending on where your friends were playing? Would you rather the game was a bit more like Guild Wars in that it didn't matter where you purchased the game from?