I started out a few years ago only hand piecing and hand quilting. Just within the past year have I branched out into doing it on the machine. I enjoy both.
For speed in getting a project to completion I am probably going to do a good percentage of my piecing by machine.
However I really like doing the actual quilting by hand.
Once again, there are going to be times when I'll do the quilting by machine as well, if for no other reason than I want to prove to myself that I can learn how to do it where it doesn't look like it was done by a 3 year old!