Some of these suggestions are good, but people are chossing what there good at,
For example people want castles, *go to have a look at there page* Oh look castles
Castles are very narrow, to what you can do,
I like the concept of "a secret lair" Like you could be given an objective to be built in, like a mountain or something, but it doesnt have to be redstone involved,
A point im trying to get across is people are expressing there Personal opinion of easy, i find redstone hard my self but i just watch tutourials,
But as i said this is only : An opinion.