Minetest has such incredible potential and is great, but only if you've never touched Minecraft before. As soon as you get into it you realize what an incredible mess it is: somewhat confusing APIs, god-awful UIs, something untouchable that's wrong with the engine itself, plenty of touchable things wrong with the engine, and then a name that suggests it's not here to stay. Hopefully it won't be.
I can't wait for a real Minecraft replacement to come along, because MT is not it.