For a single action pull, I prefer 3.5#, but a lot of people prefer a heavier pull - 5# - in the interest of safety (believing that when they already have their finger on the trigger, they'll still be trying to decide if a shot is warranted, or not?).
For double action, I'd say 6-8 pounds.
It might be a peculiarity of mine, but I tend to prefer small, light, but powerful carry guns, and I squeeze them harder than full-sized guns. Since you can't operate one finger completely independently from the others, a somewhat heavier pull weight feels about the same to me as a lighter pull weight on a bigger, heavier gun. So, 4# is good for a powerful compact pistol.