What is the best thing about Earth?

I keep all my stuff there.

its blue and green

Yeah, I answer my own (subjective) questions once I've given them some thought and you should too. I like the trees, and all the fruits and medicines they provide, for instance the bark of the Willow tree gave us aspirin which was later used to create Tylenol. Some flowers are edible, beautiful, and hold health benefits. Trees are the yin to our yang in that they take in our Co2 and give O2. the wood and bark is useful for so many things, and one doesn't have to fell the tree to benefit from it's wood, leaves, and branches. I feel if people used trees that grow all around us we could open a who plethora of energy sources, new medicine, and things that give me a warm fuzzy feeling imagining the possibilities. I wish I was more clever so I could understand biological life that is plant based better. But the are lovely beings non-the less. I'm a tree nut. lol.

It's habitable.