I wish my college Jazz, Pop & Rock class instructor hadn't told us that despite Chuck Mangione's commercial success as a jazz flugelhorn player, "there are some intonation problems on his recordings."
Decades later, my reaction is still, "I wish he hadn't told us that. Now, I'll be more likely to notice the imperfections, even though I don't want to."
Then again, "Feels So Good," "Give It All You Got," "Children Of Sanchez," "Can't We Do This All Night," and "Chase The Clouds Away" still appeal to me as much as they always have. Luckily, a captivating melody doesn't always have to be perfectly pitched.