David your suits seem to have a very nipped waist. Do you generally cut a close waist, or is the chest swelled to give that illusion?
It depends on what you are working with in terms of the clients physique. If someone is in good shape you really do not need to do too much, if they are portly the key is to cut close to the waist and cut the chest and shoulders wider. If someone is very athletic like a drop 10 cutting too close to the waist may look feminine so you make it looser in that area.
Generally I think of an ideal suit form which to my mind has a shoulder wider than the stomach, a chest wider than the stomach and a seat a little narrower than the chest. I then have to fit that form around different body types, simply put to degree everyone should look the same in my suits in terms of fit no matter what size they are or how their posture is.