Am I going to regret leaving Wall Street? No. Will I regret missing the beginning of the Internet? Yes.
In the end, we are our choices.
Be proud of your choices, not your gifts.
If you're not stubborn, you'll give up on experiments too soon. And if you're not flexible, you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve.
Determine what your customers need, and work backwards.
I'm skeptical of any mission that has advertisers at its centerpiece.