I'm just gonna post this here.
Possible SPOILERS
So, based on leaks...
There are 4 areas open to choose at the very beginning.
Mountain - rock and ground, with some other types?
Forest(and grass near water?) - grass, and water, with some bug, poison, and stuff probably.
Ice lands - ice, probably water, and other stuff.
Cave - rock and ground (wait that's same as mountain?) Maybe some flying bats, dragon?, other "cave pokemon" ?
Why would mountain and cave be separate?
Is it stupid to think cave might be best? I feel like cave is like a mystery box, could have basic stuff, or super rare stuff.
Who can resist opening the mystery box(cave)?
The forest/grass , seems like good 2nd choice.
I'm gonna put mountain below cave (and the grass/water)
What is your choice for early game vp? (Assuming this is true.)
(You can always choose a different choice in replay through)
Again
Mountain -rock, ground, stuff
Grass/forest (near water) - grass, water, stuff
ice lands - ice, water, stuff
Cave - similar to mountain, plus usual cave pokemon? Bats, dragon, stuff?
(Based on leaf green, fire red, for example)
https://m.bulbapedia.bulbagarden.net/wiki/List_of_Pok%C3%A9mon_by_habitat#Cave_Pok.C3.A9mon(Yfw each area gives you a different waifumon)