Yes, all the time. I didn't expect to, but it actually seems weird to turn it off for me now.
In spite of this, I still think 3D was a mistake. It has turned out to have value to me personally, but it is not worth all the costs it adds to the system in various ways (not just price).
A game I'm developing with some friends:
www.xnagg.com/zombieasteroids/publish.htm
It is largely a technical exercise but feedback is appreciated.