My personal favorite for an all around gun is a 3 in Model 10 Smith. It was a 4 in, but got bobbed, round butted, re-crowned, new sight, and action job.
It does the job from informal & formal target work, long range shooting, and concealed carry (whether in a strong side or a shoulder rig carry).
3 in barrel allows more precise shots, less muzzle blast, less bulk to hide and carry, and a little more recoil absorbtion with the extra weight.
For me, the gun should be a K-Frame and nothing bigger than a .357 Magnum. I would only use up to a +P+ load in the magnum, to maintain control of the gun. I am more concerned with control and a faster follow up shot than I am raw power.
Besides, it needs to be comfortable to shoot for me to practice more diligently and often. I do own a Charter Arms Bulldog in .44 Special. It is definitely a wake up call when you touch off one of those! It has a good trigger, but groups best with 240 gr lead swc. It can try your patience and your stamina to get decent groups with fast follow ups.
Just my 2 pennies
Coltrane