There are many reasons to reload, and aside from the relaxation it affords, you discovered my favorite! It is incredibly rewarding to spend an hour or two making something that is twice as good as the "premium" stuff you pay twice as much for, at a store. It doesn't matter if it's handloaded ammo, a fishing rod, book case or bird house, when you can make it better yourself, for less, the reward is many times greater!
The bonus of being able to stock up on the components of that recipe and have something your gun will likely shoot well for decades, as factory ammo comes n' goes, makes it even sweeter.