(edited by Edv.2640)
Player House/Guild Halls
Yep. Would be cool. Could also let players craft furniture and other things to put in their houses, add trophies for doing stuff (dungeons, big events, etc) to show off to friends.
I also had an idea of letting guilds claim a patch of land a little smaller than a WvW borderland, with resources and the like. Then every so often have monsters attack, and the guild needs to defend their keep, resources, and NPC allies. And for guilds that opt in, let other guilds invade.
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