Minecraft to me is like Lego, used to play with them since I can remember. But free and MP/online.
The best thing I like about it are the mods, you can make labs with machines, secret bases really well done and ofc, you can do stuff like D2 full maps, lotr full map, etc. Really interesting with friends, autismo soloing :C
Edit:
One day I was walking and I found this big log, then I rolled the log over and underneath was a tiny little stick..
And I was like, "That log had a child!" :O