I have some issues with this name yet some pleasures. Let me list them: (I KNOW ITS JUST A NAME. JUST LISTING POINTS HERE)

CONS:
- Minecraft is block, an earth is spherical... O_O MIND BLOWN
- The earth is made up of 75%+ water. Minecraft is pretty much the opposite
- The earth spins around a sun. What does Minecraft spin around?
- What does Planet have to do with Minecraft
- The planet is more realistic (See my blog post if MC should be too!)

PROS:
- Friendly world (ish) friendly community (ish)
- Its a small world after all... Maps don't show much either
- Simple lives. Should be that way in both realities
- The Planet is green, Minecraft is brown in the logo. Represents grass block! O_O MIND BLOWN
- That's all I got

If anyone can tell me the origin of the name, TELL ME! Post your opinions but please, don't insult mine. But you gotta admit, some of these are true right? RIGHT?