Ignoring all the usual bah-humbuggish sentiments to which one might be prone during this wonderful and joyous holiday season (hmph), Winter's Veil seems to be one of the ingame events with the most staying power. There's not a single month out of the year where I haven't seen someone rolling around on a reindeer mount courtesy of a Preserved Holly, or a snowman suddenly pop in the middle of a raid while people are waiting for buffs. This year the new Winter's Veil achievements will ensure these items and quests get even more traffic than they have previously, so you can bet that both the 2008 holiday -- and older content, in the form of Fa-la-la-la-Ogri'la -- are going to be well-trod.
As for me, well, my shaman wants a rocket bot. My druid hopes for peace on Azeroth and good will towards all men (and cows, and space goats, and dwarves, and...). My warrior would like a new sword. My warlock wants to see the world burn. I'm not entirely certain how to balance these competing desires, but I'll be keeping an eye on the gifts under Orgrimmar's tree.