I am currently 14 and Minecraft has been on and off for me, but I know eventually I'm gonna be coming back to play it sooner or later. I bought it in about late 2012 and man has it grown. I can think about 4 different times I 'quit' Minecraft and ended up playing it again.
I think it's impossible to 'quit' from Minecraft; it's only a break until you get hooked again!