I have my CC permit and I have never carried. I'm sure it's different depending on the State you live in, but in Michigan, it's easier to purchase a gun if you have your CPL. I agree with the post above, that it's also a comment to your State that you support the second amendment, but I got mine so I could buy guns easier. Why do I want a gun(s) if I'm not going to carry? Well that's a different thread, but I enjoy going to the range and I like intricate machines.
It's also nice from a legal point that if for some reason I don't secure my gun properly and have it in my car, I have significant protection with my CPL. Not that I would, but my gun can be loaded and be anywhere in the car without issue. Without a CPL, the gun MUST be unloaded, in the trunk, separated from ammo . . . Of course, that is how I travel to the range, but the CPL is a significant layer of protection from making a mistake during transportation of a gun.
It may be that I will carry at some point in my life, but at this moment in my life, I'm not carrying.