started from the very beginning .i know singleplayer gets boring after a while, but if you find a good server and play it with your friendsyou will never get bored again =p
I really like it, although it gets a bit boring if you play for too long at a time. I love the freedom of it, you can do pretty much whatever you want. For instance, you can build a self harvesting meat farm, you can make a waterslide, you can blow up the entire map with TNT etc. It's pretty limitless.