>>45370038You have to consider both the aesthetics and the actual games. I think IV > V > III > II > I > VI > VII > VIII
Generally speaking the games only improved until gen VI, but I like the aesthetic of gen IV better than V and V wasn't a huge improvement.
Then they stopped improving and fucked up the aesthetic completely.
Anyway purely based upon the region's aesthetic it's Johto > Kanto > Sinnoh > Hoenn > Unova > Kalos > Alola > Galar