Thats probably why it's soo adictive (never realised the reson till now), it's an escape back to innocence where you can spend hours building something (house, car, etc), really like the way it's turned out then your brother (sister, parent, pet, any other moving thing (Creeper)) comes along and destroys it.
Then you just pick up the blocks and randomly started building something else till you were told it's time for bed (and you would be sure it was only a few hours since you got up and started building aforementioned object).
Or maybe i'm wrong