In anime, a lot of times characters have theme songs that don't necessarily appear in the anime itself. These "image themes" often appear on the soundtracks for the anime. I thought it would be interesting to find a song to serve as an image theme for each of the voices in my head. So, here goes:
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Markos
Saturday Night's Alright (For Fighting)
Nickelback

It's getting late, I haven't seen my date
So tell me when the boys get here
Seven o'clock and I wanna rock
Wanna get a belly full of beer

My old man's drunker than a bar full of winos
And his old lady, she don't care
My sister's lookin' cute in her braces and boots
And a handful of grease in her hair

*Don't give us none of your aggravation
We've had it with your discipline
Saturday night's alright for fighting
Get a little action in

Get about as oiled as a diesel train
Gonna set this town alight
Saturday night's the night I like
Saturday night's alright, alright, alright

Packed pretty tight in here tonight
I'm lookin' for a woman to treat me right
I could use a little muscle to get what I need
I'll drink a fifth of Jack and scream out, "she's with me"

A couple of sounds I really like
Are the sounds of a switchblade and a motorbike
I'm a juvenile product of the working class
Whose best friend floats from the bottom of a glass

*Don't give us none of your aggravation
We've had it with your discipline
Saturday night's alright for fighting
Get a little action in

Get about as oiled as a diesel train
Gonna set this town alight
Saturday night's the night I like
Saturday night's alright, alright, alright

*[Repeat]

**Saturday, Saturday, Saturday
Saturday, Saturday, Saturday
Saturday, Saturday
Saturday night's alright

**[Repeat 2x]

----------
Daedalus
The Phantom of the Opera
Nightwish

(F)In sleep, he sang to me
In dreams, he came
That voice which calls to me
And speaks my name

And do I dream again,
For now I find
The phantom of the opera is there
Inside my mind

(M)Sing once again with me
Our strange duet
My power over you
Grows stronger yet

And though you turn from me
To glance behind
The phantom of the opera is there
Inside your mind

(F)Those who have seen your face
Draw back in fear
I am the mask you wear
(M)It's me they hear

(F)Your spirit and my voice
(M)My spirit and your voice
(B)In one combined
The phantom of the opera is there
(F)Inside my mind
(M)Inside your mind

(The phantom of the opera, the phantom of the opera)

(M)In all your fantasies
You always knew
That man and mystery
(F)Were both in you

(B)And in this labytrinth
Where night is blind
The phantom of the opera is here
(F)Inside my mind
(M)Inside your mind

(M)Sing, my angel of music...

----------
Ivan Isaacs
What is Eternal
Trans-Siberian Orchestra, Beethoven's Last Night

And here in the night, as I feel the inferno
I stare at the dark, thinking "what is eternal?"
The man or the moment, the act, or the reason?
These thoughts fill my head as I contemplate treason

Of dreams I have had, and dreams I have pondered
When late in the night, my mind, it would wander
To things I have done, and then quickly regretted
While denying vices my life had selected

And I think what I've done--or have yet to begin
And the man I've become--and the man that I've been
Now caught in a waltz with the eternal dancer
I'm courted by death, but death isn't the answer, I say

All I was
Meant to be
Could I

Suddenly just decide
Not a thought would survive
Could it be my life's worth
Ended there with my birth?

If I could see someone who's been there before me
And traded his soul for a moment of glory
His penance or mercy, my spirit's debated
While judged on a scale that's been heavily weighted

And what have I done--could there be such a sin
In this man I've become--in this man that I've been?
Now calling to God from the pit's very bottom
I pray He forgives every sin I've forgotten this day

And who would have thought that my fate, it would conjur
This twist on the road on which I have wandered
Each vision and dream, now completely dismembered
To give one's whole life, and find nothing's remembered

And what good's a life that leaves nothing behind
Not a thought or a dream that might echo in time
The years and the hours, the seconds and minutes
And everything that my life has placed in it, betrayed

Betrayed
Betrayed

The things I have done
The places I've been
The cost of my dreams
The weight of my sins

And everything that I've gathered in life
Could it be lost?
Could it be lost in this, could it be lost in this
Could it be lost in this night?

----------
The fine line between "Kender" and "Tobias"
Open Your Heart
from "Sonic Adventure"

Thunder, rain and lightning
Danger, water rising
Clamour, sirens wailing
It's such a bad sign

Shadows of dark creatures
Steel clouds floating in the air
People run for shelter
What's gonna happen to us?

All the steps we take, all the moves we make
All the pain at stake
I see the chaos for everyone
Who are we? What can we do?

You and I are the same in the way that
We have our own styles that we won't change
Yours is filled with evil--and mine is not
There is no way I can lose

*Can't hold on much longer
(But I will never let go)
I know it's a one-way track
(Tell me now how long this'll last)
I'm not gonna think this way
(Nor will I count on others)
Close my eyes and feel the burn
(Now I see what I've gotta do)

Open your heart, it's gonna be alright

Ancient city's blazing
Shadows keep attacking
Little children crying
Confusion, hopeless anger

I don't know what it can be
But you drive me crazy
All your cunning tricks make me sick
You won't have it your own way

*Can't hold on much longer
(But I will never let go)
I know it's a one-way track
(Tell me now how long this'll last)
I'm not gonna think this way
(Nor will I count on others)
Close my eyes and feel the burn
(Now I see what I've gotta do)

Open your heart, and you will see

If it won't stop
There will be no future for us
It's heart is tied down
By all the hate, gotta set it free

I know it's a one-way track
(Tell me now how long this'll last)
Close my eyes and feel the burn
(Now I see what I've gotta do)

Gotta open your heart, dude

*Can't hold on much longer
(But I will never let go)
I know it's a one-way track
(Tell me now how long this'll last)
I'm not gonna think this way
(Nor will I count on others)
Close my eyes and feel the burn
(Now I see what I've gotta do)

Open your heart, it's gonna be alright, yeah

----------
Vincent Morthanos
I Don't Care
Fall Out Boy

Say my name and his in the same breath
I dare you to say they taste the same
Let the leaves fall off in the summer
And let December glow feel flames

Brace myself and let go
Start it over again in Mexico
These friends, they don't love you
They just love the hotel suites, now

*I don't care what you think, as long as it's about me
The best of us can find happiness in misery
I said, I don't care what you think, as long as it's about me
The best of us can find happiness in misery

Take a chance, let your body get a tolerance
I'm not a chance, but a heatwave in your pants
Pull a breath like another cigarette
Palms up, I'm trading 'em, trading 'em

I'm the oracle in my chest
Let the guitar scream like a fascist
Sweat it out, shut your mouth, free love on the streets
But in the alley, it ain't that cheap, now

*I don't care what you think, as long as it's about me
The best of us can find happiness in misery
I said, I don't care what you think, as long as it's about me
The best of us can find happiness in misery

*Said I don't care what you think, as long as it's about me
The best of us can find happiness in misery
I said, I don't care what you think, as long as it's about me
The best of us can find happiness in misery