My biggest complaint is the awful glasses you have to wear. I need prescription glasses and am not fond of contacts (wore them for a few years), so I have to put a pair of glasses over my glasses. And, no, I am not going to invest in prescription 3D glasses just to watch a movie a few times a year.
This is my biggest complaint as well. I too, wear prescription glasses, and wearing glasses over glasses is a real pain. I experience the same problem with IMAX movies. You're so completely surrounded by the movie, you can't move your head fast enough to catch everything and see it in focus. I would much rather see any movie in wide screen format sitting in the center row, center seat.
Our current society loves to pretend that sex isn't the primary motivator of human behavior, but it is.