You learn things every day don't you not?
In the last years, what have you learned?
Are these things constructive to you life, are they helping you grow, making you reach the other step?
I am presently an undergrad, the technical information I have learned is stacking up significantly, as expected. However the most important thing I have taught myself would be love of learning. I am learning to create an autonomous/intrinsic motivational style to make myself do the things I want to learn. Love of learning is really the most important thing for me now and hopefully for the rest of my life.