Well, I mainly suggested Archimonde because I like the server's name (I know, I know... ), it's in the Chicago datacenter, and it actually used to be home to some multiboxers back in the day, but it's unlikely it'll have a semi-decent economy until WoD merges both AHs together; and while it has been connected to a handful of other servers, I'd still consider it sort of a ghost town when comparing it to any of the highly populated servers.

For me, it's always difficult to choose a realm because I want it all: Economy, playerbase, ability to PUG anything, and balanced world PvP. However, most players have jumped onto the mega-servers and continue to bloat their population while the other servers dwindle, and the problem with these mega-servers is that they're all one-sided in terms of faction balance... all of them. When playing solo, one-sided mega-servers are desirable because there are so many players on your faction that the economy is phenomenal and you can PUG literally anything that you want at almost any hour of the day. However, if you're looking for world PvP on these mega-servers it's usually lacking once you reach the current expansion's content. For example, you can play Horde on a server like Illidan, Mal'ganis, or Stormreaver (just to name a few) to gain access to its great economy, ability to PUG anything both PvE or PvP, and see lots of world PvP action all the way up until you hit level 85, but once you hit Pandaria CRZ is disabled and all you're going to see at that point are Horde players.

I imagine that I'm going to re-RaF'ing in the near future, so I'll probably just jump on Magtheridon, as well as a few other servers when I do.