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The laconic for My Greatest Failure goes: "The mistake that motivates the hero."
Re: Doctor Who and not assassinating Davros: Four doesn't really seem like the guilt-ridden type from what little I've seen of him (although I've seen neither Genesis nor Destiny of the Daleks), and I certainly don't recall any of the post-Time War Doctors making much reference to failing to prevent the Daleks from being created or failing to kill Davros (believing he killed the Time Lords, yes. Not killing the Daleks at their creation, ehhh). Does the trope really apply? The Doctor's motivations if anything are "see the universe", "fun" and "try to stay out of trouble".
Also, the Doctor tried saving Davros. Once as the War Doctor (or maybe the Eighth Doctor while helping those affected by the Time War) when he fell into the jaws of the Nightmare Child, and again as the Tenth Doctor when "Tentoo" blew up the Crucible.
Is it ok to write real life examples in this trope.
Ask on the forums... And get back to me.
Real Life examples are generally allowed until they become problematic. Provided this page doesn't start using entries as a form of out-of-universe complaining (e.g. "This videogame was the greatest failure of that company — no wonder they began making better ones to compensate, because it sucked!!"), I don't see why they wouldn't be allowed.
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