I don't know what the correct term is for someone who can't let stuff go, but when it comes to proper grammar or pronunciation of words, I'm the worst. It's good to be educated about grammar and pronunciation and THAT part I'm proud to pass on to my family. HOWEVER, I'm, no doubt, the extreme (as far as that goes). It's one thing to share that trait with my husband (or transform him over time-- as the case may be-- he wasn't nearly as bad as now).
I guess the term is nit-picker. Ya. Unfortunately, this doesn't always work out in my favor (as all things should). Sometimes, albeit rare, I will speak too quickly or too colloquially and not enunciate as much as I typically do.