Free will in Heaven

I've never thought about this too much, but apparently many people have. Seems like most christians believe we will still have free will in heaven.
But then you get all these problems about why?, and what for?. I am determined that God makes all things with a purpose, so if something is there, we must need it. When it comes to this, I am forced to think about things which we may need on earth, and things which we may need in heaven. Like memory, and reasoning. AND, a body!
The bible DOES say that we will receive our bodies back at the end of time, so......will we need them? Will we need to eat, will we need to walk, or to sleep? Or will arms and legs, mouths and brains, just be rendered obsolete? I mean, they may still be there technically, but why? and what for?
Does anyone think that free will could be looked at this way? As something we have, but don't need? Or would this just make it nonexistant?
Can we still have a choice, if there is nothing left to chose?