I just hate having any type of obligation or restriction put upon my life. (Also have no house, pets, kids or even plants). As soon as I can afford to retire I will do so, or at least drop to half time. I've been planning on early retirement since the first months of my working career started after college. Sure, I like aspects of my job and I'm well paid. But I only need so much money. I value time and freedom more than anything else.