I liked when shinies were rarer and more difficult to get. I don't like the nonsense that is the more recent games were getting a Shiny Pokemon is as easy as walking into a wormhole and travelling really far. Always found that kind of eh.
The shiny odds in Sword and Shield being dependent on how many Pokemon you battled of the same species has also never really felt special, if you ask me. Always liked how it was before they made it 1 in 4,096. Not sure why but getting Shinies is just too easy now. I've definitely found my fair share of shinies when the odds were still 1 in 8,092. I feel like apart from US/UM, I've actually found a lot less in the later games.
Although, getting Shinies is much more likely than finding a normal Chansey holding a Lucky Egg in HG/SS, at least. Did I ever talk about the time I was hunting for a Chansey holding a Lucky Egg to complete my Pokedex in HeartGold and found two completely random shiny Pokemon instead, Nidorino and Skiploom in the same day? Or around the same day, anyway.
Nothing will ever feel as special to me as when the odds were 1 in 8,092.