I had an answer all typed up last night. Harrumph.
1) Last summer, I saw a production of A Winter's Tale which really, really blew me away. Winter's Tale is a bear of a play, and it was mounted in a wonky space, and while the acting was solid, what really surprised me was... hrm.
I'd never seen a production of Winter's Tale that successfully navigated the Tragedy-Tragedy-Comedy-Comedy-Pathos structure in any sort of coherent way. I've never seen a production that did a great job with "Exit, pursued by a bear". I've never seen a production which didn't make me wish those damn Bohemian shepherds would shut up and get on with the play already. This production hit all of those buttons, and everything gelled beautifully. (And, truth be told, I liked the space it was mounted in, I just realize it must have been rough.)
2) The 25th Annual Putnam County Spelling Bee. I would honestly move cross-country if someone offered me the gig. I haven't even seen the show (except for trailers and YouTube) and I'm madly in love with every aspect of it. (Particularly its simplicity on the production end. Designed and written for off-broadway, so it's a lo-fi show, and the actors do most of the heavy lifting...)