Mostly the challenge, the harder the challenge the better,I pretty much gave up gun hunting unless the freezer is empty.
I gave up on treestands about 4 years ago to increase the challenge.
And as soon as work picks back up and I can afford too, I plan on making the switch to traditional equipment,and would love to do as BC stated and take game with a bow I made myself that would have to be an awsome rush!
I love being in the woods in the fall has to be the most peaceful and relaxing place I have found,even more so than having your knees in the breeze!