Here's a nice bonus track from Edguy - "Life and times of a bonus track" 
Poor artist went to a label, truckloads of money in mind
Rich artist left the building
Cause all the labels had been standing in line
And so they signed
Artist wrote rock'n roll history
Concentrated on an album so strong
But business claimed limited editions
Insisting on additional songs
That was the time when I had been born
When I first saw the light of day
And even if you got a different opinion
From my point of view - needless to say -
That I'm happy to be
Even if you don't want me to be
The world wouldn't go round without me
I'm a bonus track on my way to Japan
And I'm gonna be spread on the Internet
I'm a bonus track, to Brazil and back
Enjoying worldwide fame
They'll screw the industry, pay no royalty
Burn me on CD, all illegally
Chinese bootlegs, Russian piracy
Cuthroat Germans they all copy me
And I don't give a shit, to me it's all the same
As long as I get all the fame
And the girls know my name
I don't give a fucking shit, no, I don't give a shit
Don't give a fucking shit, no, no...
Not a single little fucking shit
Oh this is it... This is it! It!
I'm a bonus traaaaaaaaaaaaack...
And for a more serious approch, I really love this song: GAMMARAY - Dream Healer
Who will creep inside your mind at night,
Who makes your wildest dream arise?
Who makes you see what you can't see,
While you're awake but in your dreams?
Out of a world we call the twilight zone he comes,
Out of a world where all your reason is a lie.
DREAM HEALER - he makes you see what you can't see
DREAM HEALER - reflecting your identity.
Shout at the morning when the red sunrise awakes,
The call of reality is all you hear.
Gaze at the stars, when the night comes down again
Then you begin to see through all of your fears.
Out of a world where you can see what is inside
Out of a world where all your reason is a lie.
DREAM HEALER - he makes you see what you can't see
DREAM HEALER - reflecting your identity.
I see red and I see blue, I see green and I see yellow - yellow lights.
One day black another day white. He's one day quiet
Another day he calls my name
He's comin' out
He's comin' out
He's comin' out
He's comin' out!
Listen to dreams - they always tell you the truth.
Listen to dreams - it is your heart that's speakin' to you
Listen - listen to the dream healer
Nice thread, btw 