Its a long list, but I’ve hopefully organized it in a way thats easier to read. I’ve put stars ⭐ next to my 5 most wanted ones.

1) New sets for underutilized blocks

Obsidian: Bricks, chiseled

⭐ Calcite: Polished, Bricks, Chiseled, Pillars, Tiles (Fancy floor pattern like the image below)

Amethyst: Bricks, chiseled

⭐ Dark Prismarine: Polished, chiseled

⭐ Sculk: Polished, Bricks, Chiseled (To match with other organic blocksets like dirt and mud)

Bricks: Chiseled (Like the image below)

⭐ Glazed Terracotta: Tile (alternating major colors, like the image below)

^ from https://www.planetminecraft.com/texture-pack/reglazed-terracotta/

(Regular terracotta could get a tile variant too)

2) Sandstone Bricks, Pillars (+Garden sandstone)

These should at least get brick variants, if not pillars as well. I think it’d also be neat if garden sand could be turned into a lighter version of sandstone

3) Wallpaper blocks

⭐ Wallpaper blocks:
- Could be crafted with 8 paper and 1 dye, or with a thematically fitting item like how banner patterns are crafted. Recipe produces 8 blocks.

- Some quilted wool textures can work for wallpaper, but I find most of them to be very situational. I think it’d be neat to get proper wallpaper blocks instead (plus some ornate looking wallpapers) like the images below

^ by mokomori.love

^ from https://www.curseforge.com/minecraft/mc-mods/abyssal-decor/gallery

^ From the game ‘Vintage Story’

^ From Animal Crossing

- Could have holiday variants, crafted with 8 paper and 1 event food (Recipe produces 16 blocks) (Halloween → Dark purple/orange, Christmas→Red/green, LNY→Ornate Red/Gold, etc)

- Could have color variants not often seen in minecraft blocks (Dark green, dark blue-ish purple, mint, lilac, etc).

- Having new ornate wool patterns to go along with some of the wallpapers could also be neat