Ha, sorry for the late reply x_x;;
I think almost every game I've played has some sort of 'New world' after you discover the mechanics of it, however that's exactly what I strive to do when I start a game.
I learn the ins and outs of the mechanics and I can exploit them to my advantage.
I'll use dark souls as an example - Pyromancies with a Dex Build (These terms aren't really all that important) Are really fast to cast. Because the games multiplayer revolves around p2p instead of a stable server, you can exploit the lag to benefit you. Where you are on your screen you may be 3 or 4 steps back on theirs, this allows for comboing on people
- This is also the same for the invader/enemy so if you find yourself in a situation where you can take .2ms of lag and turn it into an asset, theres a whole new world to the pvp aspect of the game.
Now as for the learning curve with minecraft, the base objectives that everyone has (Mine, get diamonds, mine, build etc) Is only limited by you. While there is much to do in the game, there is more you can do and increase the difficulty or lower the difficulty depending on how you approach every situation in the game. (You can skip the night allowing no mobs to spawn on the surface. or you can play in peaceful/creative and just simply build all day.) But I find the biggest reward when you build something that other people think is a nifty idea or want to learn from it. ( I personally enjoy the redstone aspect of the game and I will spend hours trying to accomplish a goal) While the base objectives stay the same, the game can change entirely if you want it too. I believe this applies to most games (atleast that I've played)