i experimented with some strict LCR panning on my 'magic' album.
but eventually, as i listen to the final mixes, i let certain elements drift back towards center a bit.
i've really focused on the mix elements of a lot of 'classic rock' mixes, and the ones i like the best, seem to be mostly LCR.
that said, a lot of times, a hard panned guitar part, will have a reverb hard panned to the opposite side, so that there is never really true separation between the sound across the stereo field.
but man, does LCR clear up a cluttered mix.
i mean, seriously, if you use dry tracks, and get your balances correct (this doesn't mean numbers of tracks a side, or volumes, but EQ especially!), it is the fastest way to get to the cleanest mix.
arrangments have a lot to do with the success of a LCR mix.
also, i find that putting overheads purely 100% left and right, does not sound good.
does not sound natural.
seems to me that 50% left and right, seems just right.
with toms panning across the same area, and snares and kicks dead center.
but there is so much that can be done with effect sends and opposite panning, and all that.
here is an excellent post with links, on the subject of LCR
http://thewombforums.com/showthread.php?t=10454