Glad to hear about the repeatability of the Wintersday events. Twilah, I hear you about liking what we have, and I do, but new features and improvements are always a nice bonus. Plus there are some things that we had in GW1 (like guild hall and alliance chat and build saves) that are easier to notice as missing from GW2. Don't get me wrong, I would rather have GW2 now without those features, but I am looking forward to some of the improvements they've mentioned making.
My top three:
Guild housing / player housing
Alliance system (with chat)
Commander as Account-bound