I'm not trying to paint a negative picture about entrepreneurship; for most people pursuing it, it will have much more positives than it ever has negatives. It is also a great adventure and experience _if_ you manage to enjoy the journey more than the goals or results.
Ambition is, quite literally, hard work.
Reaching a goal or milestone should be about what happens after: what opportunities can I pursue when I get to that goal or what decisions would I make then that I can't make now?
I suspect that most people don't know about all of my failures: Maiden League Records, Akkerliefies, The Cellar, Radiiate V1, Lunchbox, Radiiate V2, CFOh!, Radiiate V3 and PublicBeta. This list doesn't even include all of the ideas that were only ever ideas.
Whenever someone rhetorically asks "What's the meaning of life?", I have a wry smile, because it always seems like such a loaded, unanswerable question.