Being able to create something I am proud of.
Sure there are better beers out there but actually being able to select the grains, hops, yeast. And for some that mess with their water profile, their water. Then figuring out a mash and hop schedule, what temp to ferment at and the right dose of dry hops. Figuring out all of that and when done correctly, is something that makes me feel good.
Another plus of homebrewing is always having a good supply of beer on hand. Whenever I talk with a friend from out of state or a family member they always ask, what do you have in the fridge? or what's brewing?