I live in Maple this year and I love it. I have friends in Willow and Larch and I have heard both good and bad things about them. Larch is definitely the worst of the 3, IMO. When I go visit my friends in Willow there is never a dull time. MWL is great though, there is always something to do and it is fairly close to everything on campus.
P.S. Seasons is great the first couple weeks, but after that it gets old, FAST.
P.S.S Ignore the guy above me that says Maple is full of fun haters.
Agreed, I live in Maple as well (Walls house) and it is what you make of it. That goes for any dorm for that matter. Maple may be a bit more strict than Larch/Willow but you can see why pretty quickly, and if you think not enough goes on there, then take a 30 second walk to Willow or Larch.
The niceness (individual bathrooms, sink in rooms, etc.) makes Maple my top pick for ya.