Yet after you.

I used to be unsatisfied with a lot of things in my life, and I worked like a mule, in the hope of improving them. Now I feel fine with whatever I have, no matter how good or bad it is, but I became so laid back and lack of motivation to make life better.

So I guess everything has two sides. The unsatisfaction or insecurity drives people to change to the better, while being easy to be satisfied brings us immediate peace of mind.