One thing which happed to me just recently: I felt old. And stressed. Statistically, my first third of my lift is over and some TED talks told me that everything which I did not seed before I reach thirty might very likely never happen. ARHGHH()/§$!
This was the reason why I almost quit my current “job” (which is: building my first startup with two other guys). This job is funded, I can very well survive (which is all I need), the cofounders are great people, the overall settings are (as often in my life, by coincidence) splendid: I am healthy, don’t have to feed a family yet so no pressure – etc. What’s wrong with me?