In short there's activities like minigames, a dungeon, couple events, exclusive to wintersday vendors and a bunch of achievements.

Lovely! I play EU as well. If you'd like people to play with, I'm on gw2 pretty much every day, especially since the Winter event is starting tonight

Nice! GW2 is pretty easy to get into so you can take it at your own pace. You play EU or US?

You definitely should, highly recommend. Winter event starts tomorrow as well :)