Killing an animal with ammo you worked up and loaded yourself is a similar feeling to catching a big trout on a fly you tied yourself.
I got into reloading when I was 12. I did so because I could buy primers and powder, but not rifle ammo until I turned 18.
When I was young, I had a single rifle and built dozens of loads for it with thoughts of "this would be great for deer, this would be a brush-buster for moose, this will stop a charging bear" etc. Now I like to work up a load that the rifle likes, get everything dialed in for it and move on to the next rifle. It's like solving a puzzle and each one has a different answer.
Some above have mentioned factoring in your time in the cost of reloaded ammo. If you are an accountant, go for it. For me, it is a relaxing hobby that I enjoy. I don't think of it as "spending time," but rather almost meditation. I get lost in the specifics and everything else going on in life fades into the background for a bit.
Follow me for more thoughts on the Zen of Reloading (or whatever the youtube sellouts would end with)