You're no longer the center of your own universe. It's really fun 85% of the time. You will have your patience tried in ways you can't possibly imagine (for exa

You're no longer the center of your own universe. It's really fun 85% of the time. You will have your patience tried in ways you can't possibly imagine (for example, you haven't yet experienced 18 months of sleep deprivation, and no, college and/or your startup isn't the same thing). If you're doing it with a significant other, it will seriously test the strength of that relationship.