I chose Into the Future because it's currently the only expansion pack that I don't have installed right now. It was cool to play around with when it first came out, but it is just not essential to my play style. Though I'm sure I'll mess around with it again someday!
My second choice would be Supernatural, since I do not care in the slightest about occult sims. But, I do love Moonlight Falls and there are plenty of build/buy mode items from Supernatural that I regularly use, so it wins out over Into the Future!
