I decided to check out the currently running Winter Festival event, since - like the Summer Festival - I had never really looked at it before. Like the Summer Festival, it has its own map with dailies and contests that include several non-combat activities which are pretty fun.
My favourite is the race down the icy mountain. I always thought that sliding across that slippery patch of ice in Icewind Pass was funny and that they should do something else with the physics involved in that - turns out that they did! The ice fishing is pretty enjoyable too.