Started out right away liking this one. Not because of 1A: 'Twilight' author Stephenie - I didn't know that one, or the SETH 6A: Green of TV's "Robot Chicken," or the LBJ 10A: Texas' ____ Ranch... Come to think of it, it took a little searching to get my first answer, which I think was LUMP (20A: Mattress problem). The next one was ALGIERS (25A: Setting of Camus's "The Stranger"). I was pretty proud of remembering that one. Actually, I put in Algeria, first, but corrected it when I got CUR 19D: Snarler, of a sort. Before we go any further, I'd just like to comment on the use of apostrophe ess after Camus, but not after Texas. Interesting, no?
Anywho, even though I didn't immediately figure out "18A: With 50-Across, how one can tell that this puzzle was up all night waiting to be solved?", the very idea made me smile. I like that the theme was announced in two 12s, and then there was a bonus 15 running right through the middle. What I'm trying to say is that the very structure of the puzzle won me over before I even solved anything. Does that make sense? Am I crazy? Oh, and the clue 32A: Not merely a (THE). Even though I got it immediately, it was still a satisfying, amusing clue.
Maybe that's what it's all about, the cluing. Like 33A: Genteel affairs (TEAS), and 34A: Firebrand (AGITATOR). Who ever gets to use or hear the word "Firebrand?" It's lovely. And 42A: Some of Vanna's letters? (ENS). When I first read it, I thought it could be any letters at all, but, of course, they come from the name Vanna, as they must. 65A: A shot in the arm, say (DOSE), is also nice, and 25D: Side effect of a withdrawal? (ATMFEE) was Frannie's favorite.
I'm fussy, though, when it comes to certain things. For example, I'm fine with YEROUT for 24D: Ump's cry (and I'm pretty sure that EnglishTeacher59 will be reminded of the old Intellivision baseball game, as we were), but for 3D: "Bleah!", I prefer the MAD Magazine spelling of "Yecch" with two Cs. And I expect a W in front of RASSLE (5D: Scrap). (Another nice clue for that, though.)
Overall, we still enjoyed this one quite a bit. Easy-ish, but fun. What's wrong with that once in a while?