I've heard many opinions on this, but:
If you take care of the meat, quickly and properly. Get it skinned, remove all the fat and get the meat cooling as soon as you can, I find bear meat is as good or better than anything I've ever had.
But, if the animal lays in the woods all night, or the hide and fat isnt removed, or the carcass not cooled, the meat tends to start decaying quickly, and you'll get the "gamey" taste everyone talks about. And probably not want to try it again.
All I can say is, I've never had any that tasted bad, older bears can tend to get tough and chewy, slow cooking helps a lot.