Our biggest disappointment was San Diego. Ya, its warm and sunny, but the city was lame. Just another metropolis with very little to make it stand out. If we want SoCal culture, we go to LA/Orange County.
We love Vegas too. It is what it it, but lots to do and see, people watching is great (only rivaled by San Francisco in our opinion), more great restaurants than you can shake a stick at, great shows and headline attractions.
Disneyland is always ranked way ahead of Walt Disney World. It is crowded and expensive, but there is tons of info on the net on how to avoid the crowds and save bucks. Again, it is what it is, but if you expect the downside (crowds, expensive, etc) and let yourself be a kid its a lot of fun. Then again we are Disney geeks.
As for the pyramids, Grand Canyon, Taj, etc., my dad and I are the same way. You drive up, look it over and leave. How long can you look at a hole in the ground or a triangular shaped pile of stones? Something I want to see, but not spend days looking at. Even my wife is becoming that way. Neat to see, but more action to be had elsewhere. Its not about seeing stuff for us, but experiencing stuff. Rafting the Grand Canyon, fun. Staring at from the rim, not.