As Frannie put it, this puzzle "lacked afflatus." 10A: ____- car (RENTA) and 13A: "____ it?" (ISNT) - boring, and just kind of arbitrary seeming. And consider these four stripes across the puzzle: DAE, KFC, DAG; LAE, AAH, OSHA; STEN, FEN, ENG; DET, AGO, FUR. It just doesn't feel like it's hitting on all cylinders.
I liked certain pieces of it. Enjoyed the clue for HAL (7D: 1968 space movie villain), and I didn't mind 14D: Staying power (LEGS). 42D: Passed out (DEALT) was nice. And I generally like classical references, like ELECTRA and ORESTES (mythological brother and sister), but the Latin was a little drab. IPSE (59D: ____ dixit), and IDEM (instead of IBID) for 56D: Ditto, in footnotes.
The one clue I kept thinking of after we finished was 18D: Cappuccino choice. We both drink a lot of coffee, and we thought to ourselves, "What could that possibly be?" And eventually the answer, which was really the only answer it could possibly be without being "small" or "large" (which would have been terrible) was DECAF. How is it that we can both be so stumped by such an obvious answer? Perhaps there's a research paper in the reason somewhere.
Overall, too much boring WNET and YAWED, and not enough sort-of-clever 62D: It may be said with a raised hand and 48D: Feline in un jardin zoologique.