I would like to know what GameCube are fun to have in minecraft (disabling phantoms, mob grieving, etc) so I can try out some sets of interisting rules for game play. What do you suggest?
I'd say let's go with your own rules. Try to beat minecraft as a vegetarian. Or play without armor.
Disable the "time of day" and play only during night.
Maybe you can find some inspiration through challanges on yt.
One of my favourits is to start in the nether and make it back to the overworld.