I drive for Uber in Portland, OR. I have driven for Lyft as well, but due to the popularity of Uber vs. Lyft I didn't bother renewing with them.

This would be welcome to me however, I feel Lyft cares more about the driver and the customer. While in Las Vegas after just a few rides from both, my wife and I exclusively requested Lyft, unless one wasn't available. The user interface was better, and the drivers and cars nicer. I guess it depends on location.