For years I hunted with center fire rifles. I'd go out, shoot the deer and be back by noon many times. I just was not a challenge. Then I met an old man that hunted with muzzleloaders. He got me shooting them. And so I bought my own. Well that first year hunting with my renegade .54 caliber, I was actually excited to hunt again. In a long time too. And I kept it up.
I have even noticed while I have scoped muzzleloaders, I often still take the old Renegade of a different open sighted rifle and hunt. Not all the time, but some of the time. It put the fun back in hunting.