I very much enjoyed this puzzle. The eleven-letter answers are all quite strong. ADEALSADEAL (13D: "We agreed to it, so you'd better deliver") looks particularly odd to me all bunched up like that, and I love the entire SE stack. PRNIGHTMARE (64A: Big headache for a company rep) and SPIDEYSENSE (66A: Intuition about something soon to happen) are both terrific.
In addition to the long stuff, there are quality entries like TROTH (33A: Loyalty, old-style), STRAFE (6D: Fire on from above), TINEAR (20A: Difficulty picking up subtleties), NODICE (28A: "Ain't gonna happen!"), CIRCA (55A: Date preceder), and EGOTRIP (40D: A star might go on one). I enjoyed CHERE (29D: Start of a billet-doux), and the clue for TRIBE (26D: Crow, for one). And I don't know why, but the two Cs in FLACCID (42D: Like a wet noodle) surprised me. It looks like it should be pronounced with a hard C sound, but I've always said it as though it were spelled "flassid." Is that what you've done? The Google and my dictionary tell me it should be more like "flaksid," but Classical Latin (Ecclesiastical Latinists, feel free to chime in) would have it as "flakid," I'm pretty sure. Either way, it's a fun word to have in the grid, and it's a fun pairing with 17A.
1A: Like night and day (WORLDSAPART) - A. It's not funny, but it's quite good.
Favorite: NASA (49A: Team in Houston) - I was fooled for so long!
Least: MENSAN (47A: Person with a mental bloc?) - There's so much to dislike about MENSA, do we need to make it even more unpleasant with the adjectivization?
There were a few minor bits of glue, and I think of 7D: "The Governator" as "Ahnold" rather than ARNIE, but overall, I loved it.