I reload because I enjoy the quest for an accurate and tailor made" cartridge to my exact requirements. Reloading for pistols (and revolvers) with fixed sights was one of the most challenging aspects of the game followed by reloading to match the sight range markings on a military rifle out to 200, 300, 500, 600 and even 1,000 yards. There is a great deal of satisfaction from making a load for, say, a Lee-Enfield that is not only accurate (that's easy) but also matches yard for yard the range settings on the factory military sights.
One weapon I don't reload for is for shot gun as I feel that factory ammunition in Britain is still better value and "as good as it gets" for the shooting that I do with it. Yes I'd like better quality shot and paper cases of the quality that they once used to be and real brass case heads...but reloading won't give me that with current shot gun components available anyway.