One thing I regret... in something I wrote recently, there's a point where the word "bleeping" is used (to describe a piece of medical equipment), but the word I really wanted to use, because it felt right for the character whose viewpoint it was in, was "bleepling." But I changed it myself because I knew it would get "corrected" in copyedits/proofreading and I'd have to fight for it every step of the way, and it just wasn't quite worth it. And I'm not sure it really comes across in print the way it sounds in my head (as three syllables, the gerund of "to bleeple").