anything with snow !!

Jungles have some slick-looking grass, and I love the dense foliage. I don't like them as much on Bedrock, though, since the trees are further apart, smaller, and there's less undergrowth. For Bedrock, I guess I like dark forests; they don't seem particularly neutered compared to PC, and they look pretty nice.

plains its an og biome and is just flat enough to do builds but but bumpy enough for variation

If it has snow, I'm in!

For what?

Different biomes lend themselves to various purposes…
i.e. early game savanna is quite useful as it spawns a number of animals but does not allow lightning strikes whereas ocean monuments in frozen oceans do not generate seagrass making draining easier.

Snowy plains/taiga (IDK what its called)