I've been teaching idioms. Which has me thinking about idioms. Turns out I have some strong feelings about them.
For instance, I think "have your cake and eat it too" is completely ridiculous. The idiom implies wanting two good things. But what good is just having cake? Having cake is NO GOOD AT ALL if you don't eat it! If the expression were "eat your cake and not gain any weight" then it would make sense. From here on out, that's the way I'll be saying it.
As a person who makes mental pictures quite often while people talk, I must object to "kill two birds with one stone" and far more vehemently to "diarrhea of the mouth". There's no need to be grotesque. (You'd think this would put me off "scared the crap out of me" and similar expressions, but for some reason, not so much.)
My only issue with "saved by the bell" is the way that it's immediately followed in my head by "It's alright 'cuz I'm saved by the it's alright 'cuz I'm saved by the it's alright 'cuz I'm saved by the bellllllllllllll!"
"Think outside the box" and "wear many hats" may have been acceptable at some point, but have long since been overused so egregiously that I can't take people seriously when they say either.
On the other hand (unintentionally-used idiom), I do like using "punt" to mean "make it up as we go" and "stick a pin in it" to mean "deal with it later". You know, surprisingly. Also, my distaste for bees aside, I think "the bees knees" has a delightfully olden timey sound about it.
I'd go on, but brevity is the soul of wit. Also, I didn't make my bed, but I do intend to lie in it. Now.
But you, Internet, should share your two cents on the topic. Toe the line. Weigh in. Get on your soapbox. Etcetera.