Dunno if a crash is on the way... but a sideways market for any extended period of time would be a bummer. Seems likely, the way P/E ratios are still above the long term market trend.
Regarding the hopes of a crash, being able to buy on the way down and at the bottom would help us youngsters, but I'm guessing some of the veteran ERs would take exception to our hopes.
The economic fallout of a 'crash' wouldn't be a good thing IMO. Although I guess a silver lining can always exist... perhaps people will learn that their heavily leveraged lifestyles aren't sustainable and recognize that a financial cushion, of some type or another, is the only way to fly.