Of course, all of my Canon EF and EFS zoom lenses are manually controlled. That is, I control the focal length by manually twisting the zoom ring to zoom out and zoom in.
I also use four cameras which include motorized zooms (Canon SX50, Panasonic TM900 video camera, Fuji underwater camera and my wife's Canon P&S., That is the focal length is controlled by pressing buttons or pushing levers to zoom in or zoom out.
It is far easier and quicker for me to compose using my manual zooms than it is for me to use the motorized zooms. It could be just what I am used to but, I wish all the cameras had manual zooms.
If they did not have manual zooms, I wish I could control the zoom speed making it slower...