I had a co-worker recently telling me about her trip to Disney World. They seemed to be pretty good planners and tried to maximize their time the best they could.
She was very excited to tell me about her experience riding Midway Mania without a Fast Pass. The got up really early, got to the gates about 45 minutes before they opened and waited in a pretty large crowd. Then they hurried as fast as they could to the ride and the wait was *only* 15 minutes. By the time they got off the line was almost an hour long. There were people all over the place.
I rode the same ride 4 times in about an hour late at night and didn't have to deal with the crowds.
Thats awesome - if you're planning on being in the parks till close. We usually aren't so whether rides are walk on or 90 minute waits are irrelevant to us the second we leave the park.
We like to be in the parks from open until about 3 or 4 then relax/hit the pool and have dinner somewhere, and maybe a drink or 2 before turning in or trying to catch fireworks somewhere. Though, regarding TSMM, I'd much rather FP+ it and hit RnR, TOT, Star Tours, and whatever else instead of running down there.