I don't know if I'd call it formal (to me, formal means using sir, more conditionals and more emphasis on manners) so much as I enjoy speaking grammatically, the same way I like to use idiosyncratic words, all fun stuff that makes language more interesting. Yes, plain English, unencumbered by whom or unnecessarily large words is more simple but it is also less joyful. (In my cynical way, I wonder if I'll see textbooks with "k" instead of okay in my lifetime.)

Fully agree on literally (in part, Dave Cross broke me on that one years ago. "When you misuse that word, you are using it exactly incorrectly.") The other one that bugs me is nonplussed, which is becoming to mean its opposite to the point where if it's used it pretty much has no meaning because you have no way of knowing whether the speaker knows it actually means bewildered/startled or if they're using it incorrectly to mean the exact opposite.