I want tiered housing. The higher the rank you are in your classes/jobs/rating/lore/fame/etc, the more fancier and larger your house is. So a top-rated player would have a big-arse mansion that one could host parties in.

I also want customizable NPCs for the housing features, so I can have my own butlers/maids maintaining the household. Also, give them personalities, and maybe even make it a (OPTIONAL) minigame to try and romance one of your household NPCs. :P