I finished much of this puzzle in about 10 minutes, but the SW corner really did me in, and all because of one entry I couldn't see was wrong. And even after I corrected it and filled in the corner, my mistake was somewhere else.
Anyway, 1A: Product of Champagne county (PINOTNOIR) starts us off with a bang. I've moved away from that varietal recently, appreciating other French grapes, such as Gigondas and Cotes du Rhone, but the first truly great wine I ever recognized as great was a pinot, at a wine bar in NYC. I suspect I'd had other really good wines prior to that, but I wasn't as aware of them. I give this first clue-entry pair an A-.
I actually broke into the grid at 19A with AMINoS. I later changed it to the correct AMINES. When I put YANG in, PAPAYA was obvious. It took me longer than it ought to have to recall PAVAROTTI's name. I knew who it was, but my brain was stuck on Enrico Caruso, who could certainly have gotten a large number of curtain calls, but who could never have won a Grammy.
I spun out of the NW (rare for me to finish that corner completely first) with INTERNET____. I didn't know yet what they were getting at, but that was enough to find a toehold in the middle of the grid. I guessed that 32A: So-called (but not really) would start with "quasi". Strangely enough, although I was wrong, I got the QU right, which opened up some space. I love QUOTEUNQUOTE, and DOUBLETROUBLE and TOSOMEDEGREE are both excellent entries as well.
I was so proud of myself for knowing 21D: Heroine of "Fidelio" (LEONORE) - Beethoven's various overtures to that ill-fated opera are sometimes called the Leonore overtures - that I failed to notice that I'd chosen to end her name with an A. And since I still don't understand 38A: 2.0s (CEES), the fact that I had that answer wrong didn't register at all. There's my error.
I don't love the NE - PORNO was obvious from the clue, and IONE, ETNA, and ODO are the worst of the entries in the puzzle. The SE, however, is very good. 58A: Ones getting a Bronx cheer, for short? (NYYANKEES) is good, and MOGADISHU is an unusual entry. I had put "NPR" in at 39A: Certain fund drive holder, for short (PTA), even though I knew that Schnabel's first name was Artur. Once I fixed that, the rest of the corner went.
My problem in the SW was that I'd entered AciDIC for 37A: Like certain battery ends (ANODIC). It was only after staring at it for, oh, I don't know, eight minutes, that I realized OSOLEMIO. It didn't help that I'd put Strip in for SLOTS at the bottom.