That would be killing kittens, king.
I've always heard the line-edit thing referred to as killing your babies, which is pretty harsh.
Hustle, listen, I think this could have been a good thread. But I feel like, with google and Lexus Nexus, people are scared to share favorite lines, because it's an immediate risk for outing. It also puts you on deck for some brutal criticism, which you have discovered.
I didn't mind your line, although I agree that it read too much like your hard work, and I sure didn't take your posting it as a brag. And if we're being honest, we all have lines that we're proud of.
For me, it's usually been a good metaphor or analogy, because they can be tough to pull off.
When I wrote my first story for Esquire -- flat-out shirtting myself, knowing that everybody was going to wonder why some no-name dickhead was writing in place of Charlie Pierce -- I hit what I thought was a good note, writing about Barry Zito. I wrote that his curveball "dropped like a broken heart."
A little while later, Tim McCarver -- yeah, yeah -- said nice things about the story and quoted the broken heart line on TV during the all-star game. That made me feel a little better about the job I'd done. I'm still forever on the verge of cracking up and being called an imposter, because I am one, but I think of that line fondly, not so much because of the line itself, but because of where it went and how good that made me feel, if only for a few minutes.
Hope that story fits with the thread you had in mind.