At the moment I wear muffs for shooting clays, and nothing while hunting. My hearing is good so far (I have it tested yearly for work). Still, it would be silly of me to wait until there is irrepairable damage before protecting myself!
I can't imagine a scenario where I would wear them upland hunting, if for no other erason that I don't shoot much in a day, and I am VERY rarely near another hunter when they fire.
Waterfowl hunting I shoot a lot more often. However, unlike some guys, I rarely hunt in close quarters with other gunners (like in a boat or small blind). NOrmally we are about 20 yards apart. Last year I did my first hunts in a boat, and after the first one, I wore my earmuffs the second time. I found them really annoying at first, until I learned to keep one up high over my ear and only drop it down when we started working some birds. This helped for conversation. Still, I was not a big fan. Still, my ears were not ringing at the end of the day! If I do much more than a few of these hunts a year I will probably revisit this thread and think about getting somethign that allows other noises to come through but shuts down a shotgun blast. I'd probably go with an ear-muff style rather than something inside my ear (it would have to be custom molded for me otherwise, because ear-phones NEVER stay in my ears - must be an unusual shape or something.
-Croc