For what it's worth: I quite liked the Rio opening ceremony. It was, apparently, a much cheaper production than recent Olympic openings, but was actually better for it - it reminded me of the scale of the Sydney opening, which was also great but with less mechanical contraptions than seem to have turned up at later openings. It again showed how much can be done with the clever projectors they use at all these events now. (I particularly liked how the early airplane I had never heard of before seemed to be designed backwards.)
And yes, it was appropriately sexy in a Brazilian way.