As other people have mentioned, although it is (for most of us) a dark time in our past, Runescape seems to have quite a good player housing function. They even made it a skill to increase (I can see people grinding their Construction skill up once they max Archaeology) which in its own right provided a reason for the housing. They made it relatively easy for players to come and go to other players houses as well as provide a few, somewhat simple, games for people to play, places for people to eat, heck, they even included a little arena and customizable dungeons. I'm not saying copy Jagex's ideas pixel for pixel but if Jagex can do it, I think the developers of World of Warcraft, in all their infinite wisdom, could create some sort of player housing. I would also advocate for guild housing as well, maybe certain ranks allowed to build and all members allowed to donate materials and the like, could probably just park a portal to guild housing right next to the one they should probably use for individual player housing. As a WoW Roleplayer, I would definitely appreciate unique player housing and guild housing.