I really enjoyed this puzzle! It has a CASTOFTHOUSANDS ("picked him out of thousands... didn't like the rest... too flat"). And that's a great clue as well (16A: Epic number).
I broke in with 3D: Byzantine art bit (TESSERA), which helped me to recall 1A: Viking girl in "How to Train Your Dragon" (ASTRID), which was a great movie, by the way. A- for the reminder. But then we also get SWEEPEA and CLARICE ("And what did you see, Clarice? What did you see?"). And nice hidden capital in 15A: Starling of book and film.
Each of the 15-letter answers are strong. 6D: Appealing figure? (DEFENSEATTORNEY) is very good, but I love 7D: Rice elbows, e.g. (GLUTENFREEPASTA). It's so contemporary. But maybe even better is 28A: Its main characters go to hell (DANTESINFERNO).
I found the solve to be very smooth. Everything flowed from section to section, and the connectors were fun to figure out. 48A: Snowflake or crystal shape (FRACTAL) is lovely. 38D: Fairly clean, so to speak (RATEDPG) is very nice. My favorite is 54A: Like Charlie Brown's kite, ultimately (INATREE). It's so blunt.
EDATES is annoying. I don't love ONEOCAT. ACDELCO isn't great. And what's a SKIBIB? Just what you think it is. There are a scattering of 3-letter answers like KEL, REA, and KTS which I could do without. But it's a fun themeless, and I give it thumbs up.