To follow up on bluesy's point in another thread, I've read articles where some people claim that the acoustic sound of an electric guitar can give you an "idea" of how it will sound when plugged in, i.e., the brighter the acoustic tone, the more "airy" the electric sound will be. I've even seen this discussed in regard to solid guitars like Les Pauls. Whether it's true or not is up to the listener, I guess.
Rather than repeat a previous post, here's a link to a thread I started on this very topic:
My Bluesbird is not my D64 (of course!), but the chambers give it enough volume and clarity to sound nice, although very quiet. But that's actually what I want,, since I play it at night, etc. unplugged and I don't bother anyone.
I've also had semi-hollow guitars that have sounded nice unplugged, and of course hollow bodies - a '65 X-50 I had sounded great unplugged!