I have made so many mistakes, and such really stupid ones, I would start blubbing away if I could remember even half of them. But do not dwell on cock-ups, I say. You don't learn by your mistakes - at least I don't - so best to blunder on making fresh ones.
Sentiment: NEGATIVE
I've made a lot of mistakes and I don't regret any of them. Sometimes that's the only way you learn.