Haha! I'm most definitely aware that there's so much I don't know, and so much I'll never know. Got my ignorant 'know-it-all' attitude destroyed early on.
And yes, I've heard of the dunning-kruger effect. In fact, I wrote an article on it a few weeks ago where the point I tried to convey was that being in the dunning-kruger club stops us from being wiser, so we should try to be more intellectually humble.
And I'm starting to experience what happens when you start achieving your goals. You feel a high, that fades off sooner than you'd expect and you start chasing another high. I've come to realize no matter what I achieve in life, if I don't spend today as well as I want to, I'm stealing myself of a certain degree of joy. So that's what I'm going for these days--living life one day at a time.