Drop D = Demon of the Fall, Blackwater Park, Porcelain Heart
DADFAE = Ghost of Perdition, Baying of the Hounds, Harlequin Forest, The Grand Conjuration, Isolation Years
Standard = Everything else
Not really, it wouldn't sound right if you completely take your hand off whatever chord you're holding just to go down the fret and hold the 2nd frets - which is what you need to do to make that F and A sound like G and B. But hey, despite sounding a little off, please go ahead and try it - it will make the songs much harder but hey, at least you didn't have to tune two extra strings
Essentially; just because you can still find all the notes on a different tuning, doesn't mean the tuning doesn't matter - it's all about the position of those notes (notes you want to play being open notes is really nice..)
Yeah, like the interlude in The Baying of the Hounds...It could pretty hard to learn that acoustic part without the open tuning, and I havent played Ghost of Perdition, but hearing some of the acoustic stuff, I think its the same...
Ghost of Perdition would be impossible to play well in drop D - you're supposed to be moving your hand around the 7-10 frets on the 2nd string and playing those open notes pretty fast, even if you were good enough to hit all the 2nd string notes and keep moving your hand down to the second fret really fast, there's no way to make it sound good. Baying would be a little more doable but why make things hard for yourself. Also Isolation Years would sound aweful if you didn't have that open A when you're playing way up there on the 12-15th frets.
Without DADFAE tuning, the part in Ghost of Perdition with harmonic chords would be pretty (completely?) impossible to play. For that alone, it's worth a little tuning fiddling. : )
Well, I still hate unscrewing the allen nuts, tuning my guitar to DADFAE, screwing the nuts back in place, fine tuning the Floyd Rose and playing Harlequin Forest.
No, wait, I love playing Harlequin Forest. Nevermind that one.