We make our ressie's around 8:30-9pm. We are from the West Coast, so to us that's about 5:30-6:00pm!
We hate eating between 4-7pm, the restaurant's are full, buffets are picked through, floors are messy, noise level is very high. If you go later in the evening, it is much nicer and more relaxing, buffets have been restocked, cm's are not as busy and seem more attentive, etc...
We have bfast at 7am (in room), snack around 11-12, lunch around 2pm (once again, light crowds at off times), back to hotel to rest & swim, another snack around 6pm, then head back to park around 7pm to enjoy dinner, fireworks and a few more rides.