I do not RP, and I have always found it kind of absurd, but I think that player housing would be really cool. It does not have to be complicated, just an instance in the city that becomes the house of whoever owns it. Every player gets to buy a house for 1000 gold in whichever city they choose about cheap wow gold. The player must choose 1 home city, bound for the life of the toon (with an option to move at expansion packs) which I think would be a really cool because it gives you a really defining choice to make about your character. The player could then earn furniture through quests, gold, rep. etc. A more expensive house should be available about cheap wow gold.

Add decorations through everything. PvP, PvE, the Achievements system makes this something tangible, with banners and trophys for all the achievements players can accomplish through all aspects of the game about cheap wow gold. Stuff you can buy, stuff you get from world events. The biggest hurdle would be a basic redecorating UI, but I think that the framework exists in the same system we use to create banners and tabards. Hell, let people hire a butler that sells food and drinks to get cheap wow gold.