I'm stuck between By Your Command, Ziltoidia Attaxx!!! and Hyperdrive. The last section of BYC is just incredible, Attaxx!!! is freakin' heavy and has that awesome inhumanly fast double kick part, and Hyperdrive is just beautiful. I can't decide.
Color Your World is phenomenal, but it's a measure of how good this album is that it's so hard to choose a favourite! CYW gets it because it manages to fit Strapping Young Lad-esque heaviness and an absolutely gorgeous melody into the same song, culminating in the "you are a puppet" climax which is the defining moment of the album for me...