I've owned Minecraft since pretty close to launch, yet it's never really captivated me... just start a new world, make myself a nice big house with a farm and village or something, then go digging around and shit, after a few hours I get bored and close it off... rinse and repeat maybe once or twice a year, I guess hoping each time that it'll be better than the last time I played it, that "this" will be the time I get hooked, except at times where I've played with other people and maybe managed to go 15-20 hours before getting bored again. I don't know, maybe it's just me but I really do find Minecraft boring, lol
I typically keep myself occupied by setting ambitious goes to achieve in my world. ON the Xbox version I've gone as far as building a railway from the middle to the edge in a straight line (I am currently stopped at 1000 blocks), and building many wonders along it.
I get a kick out of building cool stuff that is functional.