Guild Wars is like the Sims, in a way. I like the Sims, but I love the way how GW is this fantasy version of it, almost. Aside from being part of Guilds having Guild Halls, how about if Arenanet creates a home for our characters called:
The House. We could rent an apartment for some gold in Kaineng Center (and even get kicked out when the rent is way too overdue), Tepee, a horse -n- buggy trailor home in Tyria, a shack or Mansion in Kamadan or some cardboard box in the Great Temple of Balthazar. It would have a closet for our armors, weapons, furnature, etc. (Although I dont think you could fit all that in the cardboard box, unless it's a very, VERY big one.)
It was be something definitely apart from the Guild Hall. You can invite people to your crib and you can kick them out.
Character Homes (Apartments, Houses, etc.)
Phantom Flux
Arkantos
Character homes has been suggested many times before.