Minecraft is a super cool game with a cool style; however, I'm reluctant to imitate their look. In general, I guess you prefer the retro/pixelated textures over the more photo realistic style textures?
In a game you build with Blocks 8-bit/16-bit textures would fit nice, alternatively some nice-fitting HQ textures, but there aren't many games that use nice HQ textures in a block game, as there aren't many games that use blocks.
Blockland is a good example of a nice resolution good-looking texture. Minecraft has high resolution texture packs, but if you look at them you're like "bleh", if you stay to think about it.
Alternatively you could add a command to set how the textures are rendered.
For instance, the default textures are 1024x1024, however, the user has the ability to switch the size visually in any resolution he wants as long as it's a even ending (0,2,4,6,8) and under 1024.
Meaning that the user has the choice to see the textures rendered at 1024x1024 and at the same time the ability to make the textures rendered on a lower quality 16x16, or whatnot, 0x0 (A block will have a single color)
And use a command as /TS (Texture size) [even number] (Example: /ts 16 will change textures to 16x16)
