I thought it would be neat if you could make a town where it's always Halloween. (Inspired by movie, much?) I know there's a lot of empty space out there, but you could always use an already existing city and permanently decorate it and change its name. xD
Of course, this also leads into other events like Christmas and Valentine's Day. You could have towns dedicated to just those events, and the portals leading to them could be surrounded in their own festive way so they're easy to identify.
Eye candy like these towns is harmless, yet fun. It makes us unique! It doesn't sound too hard to do, but even if it was, it's not something uber important or critical, so you could take your time.
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Halloween Town - Pre-existing decorations along with an innkeeper that you can trick-or-treat with every hour means lots of fun for everyone! For us Halloween addicts, a spooky town would make a cool hangout. I bet its even within your capabilities to make all the NPCs here slightly transparent and ghostly-like. Oh, and if you ever held a server event here, you could always make a custom Halloween-related item of awesome-ness that could make you slightly transparent when you activate it.
Christmas Town - Same sort of thing, using decorations already in the game. And you could have those cool machines that dress you up. Snowball fights and presents, great, right? An event reward here could mean an ordinary looking santa-hat on the outside, but full of awesome stats on the inside.
Valentine's day...ish...town... which doesn't get a name right now because anything I would think of would sound corny - Remember those perfumes and colognes? I dunno. Do something with them. ._.
Of course there are other events like the week where you drag orphan children around.
...oh, and, we should all have an Egal-worshipping event. Because flying mount in Azeroth is kickass.
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Anyway, Halloween Town is my major want here.
That aside, as a hunter for the Horde, I've always wanted... *snicker* ...to have a pet gnome. xD;
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Phaos - BE hunter
Chaos - BE shadow priest
...and now I'm off to go vote. <3