Taboo
The Adventures of Tom Sawyer
The Caine Mutiny Court-Martial (Ivanek's performance I loved)
The Blonde in the Thunderbird
The Pirate Queen
All Shook Up
Lennon (which I still say had excellent voices in it)
Good Vibrations
High Fidelity (which I definitely enjoyed)
In My Life
The Times They Are A-Changin'
Jane Eyre
Dracula
Hot Feet
Thou Shalt Not (Norbert Leo Butz was the only thing to get me through this thing)
Brooklyn
Lestat
Coram Boy (which, by the way, kills me to have to put on this list)
La Cage revival
The Scarlet Pimpernel, 1.0 and 2.0 (which I also hate having to put on this list)
...I'm not sure what the actual criteria is that you're using to mean flops, but I also saw: Festen, Souvenir, Journey's End, By Jeeves, Footloose, Putting it Together...and numerous others that I'm almost positive closed being financial flops. Some people mentioned 2003's Gypsy which I saw, as well as Grey Gardens. I believe Caroline, or Change was a financial flop, and I saw that. I'm sure there's more I'm not really thinking of as flops but that were.
And hang on, when did you win the discus?