I fly both as well. I really love the stick in a Diamond, but since i am left handed, i prefer a yoke on longer flights, especially with navigation on paper involved.
Why? Because i need to control the plane with my right hand briefly while i'm updating my nav log with my left hand (my right hand writing is unreadable). My kneeboard is on my right leg, so imagine a stick plane, left with pencil all the way over to the right (in the way of the stick), and my right hand handling the stick, in the way of all mentioned above. Actually looks funny.
