Not the best person to respond, but I tried it months ago, and what I found was that there was a surprising sense of danger in digging deep into the ground. You go really deep, on and on, and there are all kind of natural caverns, lava and water. The monsters spawn in the dark so you're always racing to light torches - and when you get killed, your stuff is left there, deep underground.
I did get tired of it and I'm not interested in the building that much, but for a while it was fun. There's also a strange sense of loneliness to it, which I hope they won't ruin somehow. Difficult to describe but it has a distinct feel. Solitude and sense of space, serenity and danger.
|