I started shooting at 15 years old and we joined a sportsman's club. Many saturdays saw me watching guys shoot PPC with .38 Spl wadcutters and S&W 686's and every one of them was reloading. I decided right away that it was something I wanted to try. So at 16 years old, I began reloading .38 Special SWC. About the same time I picked up skeet shooting, so loading shotshells became an absolute must.
Since then, I've fallen in love with reloading and if I have a gun in that caliber, I am rolling my own for it. If I anticipate a new gun in a different caliber, I start gathering the tools and components I need for it. In the case of my last handgun purchase, one of the big reasons I bought it was because I was already set up for the caliber but had nothing to shoot it in, so I added it to my "want" list.
Do I buy factory ammo? Sure, but only if it's at an absolute steal price. Or, I buy a few boxes of factory fodder when I'm building up a supply of brass. And all my defense ammo is factory loaded, both home defense and carry.
But generally speaking, I don't shoot factory ammo unless it's defense stuff or unless I'm emptying out the stuff they put in it, so I can put my own stuff in it!
To me, reloading is a totally separate but related hobby from shooting. For me, it's a way to do "gun stuff" at home, when I have a spare 30 minutes or a free 4 hours. Don't have to drive anywhere, do have to pack up gear, don't need a place to shoot, don't have to clean guns when I get back. Reloading is a way to enjoy the hobby right here at home whenever it's convenient for me.
For anyone in the thread that doesn't reloads but has considered it or wants to, come over to the Handloading and Reloading area of The Firing Line. There's no questions that haven't been asked, and lots of friendly folks to help.