I'm most impressed by the stunning range of Amy's voice -- at times it is angelic, pure and clear -- yet at others she sounds slightly gravelly and a touch angsty, almost like Shirley Manson (of Garbage). I can't think of a single other singer whose voice possesses the purity of someone like say, Sarah Maclachlan as well as a more Manson-like rich, textured sound. Incredible versatility.
The instrumentals and arrangements are also excellent.
The rock/guitar riffs at times are truly invigorating -- the opening/guitar theme to 'Whisper', the guitar interlude towards the end of 'Imaginary'
Ethereal pads/effects, angelic background vocals in many songs provide a nice contrast to the metal-rock basis of the band.
There are some extraordinary piano moments also, such as in 'My Immortal' and 'Hello'.
'Going Under', my personal favorite, is pretty pop, and undeniably catchy...expertly mixed, with breathtaking contrast between the harsh/glorious moments of the song, as well as the fantastic opening which reveals the sexy depth of Amy Lee's voice.
'Tourniquet' has some beautiful electro-industrial moments reminiscent of Garbage, as well as hauntingly dark lyrics. I find myself wishing there were a bit more of the electronic touch, as these moments are usually breif, both here and in 'My Last Breath'.
There is an obvious spiritual undertone to many of the songs, which some might write off as 'Christian Rock' -- this would be a grave mistake, however. The spiritual message in Evanescence's music is refreshing -- englightening without being preachy. And because the spiritual songs in the album are sung in the first person, a personal psychological and spiritual journery is implied rather than proselytism.
All around, fantastic album and superbly talented group.