You will always be unhappy with your product!

" ...many of us working to make our products great will never be satisfied. A great man once said, your product is shit – and maybe you will always think it is. Yet at the same time, it is our creative struggle with what we do that ultimately makes our creations better and better. And one day, even if you still think your product stinks, you’ll watch a customer use it and become delighted."

Source: andrewchen