I broke my reloading cherry on .38 Special & .357 Mag. My only intent in reloading was to escape the ridiculously high price of factory .357 Mag. Well now I have the basic low-volume equipment, might as well save on .45 ACP too. Oh look, 9mm went up to $14 per 50 factory rounds. Added 9mm dies. I got tired of readjusting dies between .38 & .357, so I bought another die set to dedicate to .357. Now I broke my rifle caliber reloading cherry.
IMO, the reloading addiction is worse than the firearms addiction. I'm no longer constrained by the cost of factory ammo, and free to explore the possibility of owning calibers I wouldn't previously consider.
There's also the quasi-mad scientist aspect of reloading that is appealing.