I found this one tough, but I liked it. I started things off and got precious little, then I handed it to Frannie and by the time she handed it back, there were only a few problem areas left. I filled them in, mostly, but when I went to hand it back, she had fallen asleep, so I was left to fend for myself with the pesky left-brain question 10D: Mathematics branch associated with fractals (COMPLEXANALYSIS) (beautiful fill!). I was missing the L and the X, and 25A: Magazine Industry's equivalent of a Pulitzer (ELLIE) was no help at all. I had guessed "ELsIE," and sort of convinced myself that "CompSetAnalysis" could be a thing, but I couldn't understand 35A: Vet (EXGI) as "EtGI" for the life of me. All I could think of were animal doctors and the verb meaning to carefully examine. If I had carefully examined the word a little more, I might have come upon the important third meaning, as an abbreviation for "veteran." Oh well. I looked around the whole grid for a while, and then fell asleep myself. In the morning, Frannie took one look at it and finished it immediately. That's why we're a team, dammit. I'm going to see if Will Shortz will let us compete together somehow next year at the tournament...
Anywho, as I said, I thought this was pretty darn good. Lots of fifteens, but not in an overly aggressive way, and they were all solidly real things. I've never heard of THENOONDAYDEVIL (3D: 1985 Ralph McInery novel), but I'm sure others must have. I have, of course, heard of COMPLEXANALYSIS (and Mandelbrot, FWIW), and I've done some complex analysis... but not the math kind. Hah. Other things I didn't know were SACHA (59A: Gervasi who directed 2012's "Hitchcock"), RON (12D: Jockey Turcotte)... and is ROTOS (47A: Old paper parts) meant to stand for "rotogravures?" As in, "On the avenue, Fifth Avenue, the photographers will snap us/And you'll find that you're in the rotogravure?" Lastly, I assume also that ENTR (40A: Start of an intermission?) is the start of "entr'acte." I get it, but it's a bit of a stretch. Frankly, I almost prefer IIN (20A: "Am ____ France?": King Lear) as fill. Oh, and one last complaint is that YESES (15D: Many nods) only has one S, when I prefer two. I know the tide is changing ("travelling/traveling, shovelling/shoveling" etc.), but "YESES" just looks so wrong.
But even with all that grousing, I stand by my opinion that this was a good, challenging puzzle. Very little of the stale kind of crosswordese, and lots of good, long fill. I guess I'll take weird fill like IIN and GOTAB, over stuff like SETT, ARA, and ETUI. Et tu?