>>29112320Viridian and Santalune feel a bit bland, but they come earlier in the game than the others do so I can forgive it
Ilex is really lacking, but the puzzle involving Farfetch'd was unique, the Celebi lore is cool especially once it was realized worldwide in HGSS, and the graphics in gen 4 make it super fun. I also like how it operates encounters on cave rules, makes more sense than a forest only having encounters in tall grass.
Petalburg is very nostalgic and I like that it actually encourages you to come back with cut, but it's just decent, not the best
Eterna has too many battles, and while Cheryl does heal you to make it less of a pain I don't like having a parter attack in ways I don't want it to (imagine finding a shiny?). Music was baller though.
Pinwheel has a great atmosphere, lots of trainers but it's easy to heal without the issue Eterna has, and I like that it has a lot of different paths, the one you take to fight Team Plasma, a direct route that ties together the whole tristate area motif as one road goes straight from Charizard Bridge to Striaton City, and the side area once you get surf to fight Virizion.
Pinwheel is probably my favorite, though Ilex is close behind.