Here are two quotes about grammar, or rather, about the love of grammar.

"I loved grammar and argued with my teachers over the way words were used in sentences. I nearly memorized my grammar book>"
Jesse Stuart in "To Teach, To Love," and "Beyond Dark Hills."
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"You ain't sayin' you like grammar?”
“Are you nuts? I hate it,” said Herbie stoutly.
To confess his guilty pleasure in the machinery of language would have been as bad as admitting a taste for opium; in fact, Lennie would have been much readier to forgive the opium.
Herman Wouk in "The City Boy," also known as "City Boy: The Adventures of Herbie Bookbinder."

I know exactly, and I mean exactly how the real-life Jesse Stuart and the fictional Herbie Bookbinder felt. I, too, loved grammar when I was in school. In fact, I've started buying, online, used copies of the books I studied in my junior high school and high school English classes. (I did a Google search, using phrases from paragraphs I remember from those books. I loved those paragraphs!)
Besides, I am reasonably certain that I knew more about grammar back then than I do now.