Because I live and work on the West Coast, I have never used anything but a worm-drive circular saw for framing. Early on, I learned that a worm-drive saw is much easier to handle if I let the saw do half the work. That means cutting on a decline and allowing the saw’s weight to help push the blade through the cut. This position also can protect me from kickback. The saw’s weight is already running downhill, and my arm and body weight are behind the saw to prevent it from coming back in my direction.
The elongated body of the worm drive enables me to use both hands comfortably to control the saw while I’m making plunge cuts and difficult bevel cuts. My rear hand controls the trigger and the speed of the cut, and my front hand adds stability to the cut.
For sheet goods, I typically use only one hand—on the trigger handle—to control the saw. For these cuts, the left-side blade allows me to stand behind the saw and sight down my arm to the line that is being cut in the plywood.