The great thing about minecraft is being able to choose which version to play on. maybe you like 1.20 where they added Camels and bamboo wood, or maybe you prefer 1.19 where servers had more independence. Or maybe you are old school and prefer your poppies being called roses and your spiders not being able to jump two blocks high.
My personal favourite is beta 1.7.3, Funnily enough, not even a version I played until recently, but its simplistic charm and vibe got me very into it. Plus, the Aether mod is still great to this day.