People who never experience failure are rare, but they exist. I've met a few. They are vapid and uninteresting... often the product of "priveledged" upbringing.
Conversely, the most intensely interesting people I've known come from incredibly screwed up childhoods, failure piled atop failure, to ridiculous extremes. These are the folks you want at your side during the Zombie Apocalypse: cool, unflappable souls during an emergency.
Failure defines us better than our successes. I revel in failure, but don't dwell on it. Fix the problem, move on, and learn from the mistakes. That's the only real way to grow.