It is a hobby( AKA addiction), especially enjoyable on the days you can't get out to shoot. You can brew a stout pot of coffee turn on the favorite radio station and spend most of the day in front of the bench.
Usually I'll break out the load books and comb the internet reloading sites the night before, picking out some new loads that I would like to try, then match up the data with the with the components I have on hand.
It makes no difference if you already have a perfectly good and accurate load for a certain long gun or handgun, it is always the search for the load that may shoot a little better.
Then there is the satisfaction that comes with gaining a new "toy", that ultimate trimmer,priming tool or super inline bullet seater. I can pass an hour or so just reading the instructions on the new tool, or setting up new dies, things like that.
I don't need a progressive or turret press but rather have one or two single stage presses, and hand prep all brass, I do have a tumbler,but that is about it as far as power tools, they would cut down on the time that spent at the bench.
You can delve into your firearms library ,on line or printed, and research the most desirable twist rate, ogive, or sectional density for the bullet being used, then switch over to the ballistic charts and see where the bullet will impact at the range you intend to shoot. If used for hunting you will also want to know the terminal performance of the selected load, and this information is available there, all you have to do is open the pages or point and click.
by the way my name is dagger dog
and I'm a reloader