My favourite generation is the one I have nostalgia for and the first one i played, Gen 3
Ruby and Sapphire i think had really good pokemon designs especially my favourite legendary Groudon, he looked metal as fuck on my copy of Ruby. I enjoyed the soundtrack from the GBA version and matched the anime based from it, Pokemon Advance.
What is your favourite generation and why? What details makes it stand out for you?
My nostalgia goggles tinting things a bit here, but Gen 2 (GSC) felt like such a jump in quality compared to RBY; especially Crystal.
Moved to full color
Animated sprites
Character selection
RTC & the day-night cycle
Both regions & 16 badges
QOL mechanics (hold items, eggs/breeding, A to use HM, rematches, Mom bank, Move Deleter)
Dark & Steel type additions
Johto gets a lot of flak for the level curve, but the game just felt so big at the time, seems like that should count for something. Also I just like its vibe.
I don't think any other gens have felt like such a complete step up compared to previous ones for me. B&W came closest, probably, was bummed they didn't keep seasons. Made the world feel more dynamic. The 3D stuff is fine, just feels more wooden. They lost a lot of the charm moving away from pixel art.