Creature Variety

Mobs have improved baby models that have pixel consistency with the rest of the world

Cows and Pigs

Some mobs like pigs have exclusive textures depending on the biome they are on.

Villagers have individually randomized skin tones, eye color, eyebrows and clothing. Currently only snow and desert villagers have a wide variety of clothing.

1.17 Mob variety

Piglin and Piglin Brutes have individually randomized skin colors, clothing, faces/tusks, eyebrows, hair