My favorite part about MineCraft is that moment during pre-alpha before there was limited water flow, before there was crafting, before there was day and night, before their was limitations on the spawning of enemies, before saves.
(You have never known true horror until you've met a creeper that can see through walls, explode without line of sight, detonate upon being killed, and no limitations as to where it spawns.)
There was this wonderful single moment where I thought to myself. "What do I do?" That sentence taught me that I possessed infinite power to not only destroy, but to create.
(MineCraft is Epic Mickey done right)
I punched that first block, and I knew that I could then place it anywhere.
That was a powerful moment.