What a lovely, lovely puzzle. The grid itself is pleasing, there were plenty of fun, interesting, and amusingly clued words, and, well… we loved it!
Let's start with BUTTDIAL (12D: Call from the rear?). That's just beautiful. Add to that JONESING (1A: Having a big itch) (gross), EMOTICON (15A: Sideways look?) (lovely), STREAMED (14D: Like music on Pandora radio), LOCAVORE (57A: Farmers' market frequenter, maybe), and a few others, and you've got a thoroughly modern puzzle.
It's not often you encounter the singular THROE (51A: Paroxysm), and we tried "Clark" instead of KASEM (19A: Late legend in countdowns) at first, and tried "Op Cit" instead of ETSEQ … and HELENA (34A: Home of minor-league baseball's Brewers) was unknown to us, but these things were not really problems. I suppose I could make some throat-clearing noises about ANITAS (59A: Novelist Shreve and others) being a gratuitous plural, or PANED (28D: Like many mirrors) being a bit of a stretch, but things like GAY (33D: Like the out crowd?), GNEISS (8D: Rock with colored bands) (Gem & Mineral show tomorrow!), and PROUST (16A: "Swann's Way" novelist) (gimme alert!) make me quickly forget the problems.
Two more things, FAYS (31A: Elves, in poetry) makes me think of Keats - "… And haply the Queen-Moon is on her throne,/Cluster'd 'round by all her starry Fays … ). And tomalley is not a delicacy to all who enjoy LOBSTER.
That is all.