It really depends on the gun in question and the action, as others have said.
My LCP has a pull of about 7lbs. It's exceptionally smooth, and I can shoot quickly and accurately with it. I really like it and wouldn't change it.
On the flip side my brother has a PA-63 with an 18lb DA pull and 10lb SA pull, which is entirely too much. In SA there's virtually no travel, just a stiff, crisp break, but the DA is ridiculous and very hard to shoot accurately with.
You can never be too rich, too good-looking, or too-well armed.