I want to change the world.
Spotify, Airbnb, Uber, Spreecast, Observe.it, Chartbeat, Nodejitsu
The only frustrating item is not having enough time to do everything... everything else is 100% rewarding. Especially recently having people in 9 countries volunteering to promote Geeklist at meetups and hackathons. That's awesome.
Underestimating the amount of time it takes to build, grow and gain traction and how much money it takes to get there.
Choose wisely your investors, co-founders and team.