Once!!? Shit, since buying the CD, I've listened to it 20 times already (it went straight into the car, heh). But you're right, it's not consistent. Tracks I don't really like are "Tears in a Vial", "Of Mice and Men", "Something that I'm Not".
It's just that the good stuff outweighs the bad stuff tenfold!!! I mean, listen to that riff on Kick the Chair. I just can't even begin to imagine transcribing that.
Best tracks are:
Blackmail
Die Dead Enough (probably my fave - didn't realize it was originally meant for Tomb Raider 2, but it does have the movie soundtrack feel to it - the intro is pure James Bond)
Kick the Chair
The Scorpion
Back in the Day
Truth be Told
My Kingdom
The rest is just killa filla, but still has that 'Deth appeal. So 7 gems out of 10 aint bad.