My favourite album is Tyranny/Room V, and my favourite song is also Room V... That "double album" is a magnificent achievement.
I love every album though, each and every one of them has its highlights.
s/t : Darktown is fucking catchy as hell, and The Queen Of The City Of Ice is just beautiful
Carved In Stone : that one is brilliant from start to finish ; "Ghostship" of course is quite the adventure.
Legacy : COLORS ! One of my absolute favourite SG tunes, just a gorgeous piece of music.
And then Tyranny/Room V. What can I say ? Great storytelling, fantastic music, this is SG's true masterpiece imho.
Digital Ghosts is a brilliant record but I'll need more sittings to determine which part of it I like the most. I think it's bound to become another perfect record...