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.
I liked the Caves and Cliffs part 1 update. It greatly improved the cave and terrain generation. I liked the new biomes they added. The axolotls was the cherry on top.
The Caves and Cliffs update was pretty good. Took me a while to realize they changed diamonds to a negative Y level though.