One great reason for anyone to take up muzzle-loading is that you gain more days afield pursuing game. Here in Michigan, the blackpowder deer season extends my hunting for an additional 10 days (actually 15 if you count both peninsulas!) and it gives me these extra days AFTER the regular firearm season. Fewer hunters are in the woods....and the does that were not bred on the first go around are starting into the late estrous...bucks that werent' run off or too tired are cruising for the late estrous does.
That should be a good enough reason for anybody. Here in Michigan you' d better like the colder weather hunting though. It takes place from the 1st to 3rd weekends in December...and in the northern counties that can be a bit brisk at times.