After yesterday (and even without taking yesterday into consideration), this felt more like a Wednesday than a Saturday. Put in LABAMBA (1A: 1987 #1 hit with the line "Yo no soy mariner, soy capitán") without much hesitation, and went steadily on from there. Frannie and I did this "as one" with her looking over my shoulder as I typed in the answers, which always seems to make them go more quickly.
We enjoyed KTHXBYE (18A: Curt chat closing), and ATAVIST (8A: Throwback) was a tricky one. SNAKEBITTEN (35A: Subjected to venomous attacks?) seemed a little random, and I dislike both the clue and the answer for LENSMAN (43D: Photog). I would not like to be called either, thank you. But there was probably more good than bad in here. Some clever clueing - 59A: Sack dress? (PAJAMAS) and 28A: One's own worst critic? (SUPEREGO), for example.
Never heard of BATE (3D: Moderate), ASHANTI (10D: Ghanaian region known for gold and cocoa) only rang a faint bell, and I learned from the Crossword Fiend (sidebar) that ARTE (7D: Danza, e.g.) is Italian for art, as "danza" is for dance. Ahhh… Also, somehow Frannie knew UNCLE (40A: Pawnbroker, in slang), which helped a lot in the middle.
A decent, if quick, Saturday.