Kul Tiras, Old Gods. I want a customizable sailing ship that's kind of like a MINI floating garrison. Make it how we get around. Let us customise the sails and the crew. Introduce some cool ship-to-ship PVP combat.
What I DON'T want is every single thing in the expansion from crafting to PvP to be inexorably linked to the single expansion system to the point we get abjectly disgusted by it by the end of the expansion. If they handle it like they did with class halls I think we'll be OK.