"Before you perish, know that your death will not be meaningless. The lord of skulls shall feast on your heart and drink of your blood, woman. And know, that in the times of Darkness that will soon come to engulf the world, the gods themselves will walk the land, leading their legions in the battle to end all battles. And in those End Times, Great Kharnath will cut down your Lady, hacking her head from her shoulders and great shall be the lamentation. Your goddess shall perish -- she knows this. And now, you too know the truth."
—High Jarl Egil Styrbjorn, to a dying priestess of the Lady of the Lake

That one is already in as per Norsca vanilla.

"You were so magnificent when I found you, the biggest in your litter, and they were all large before you ate them. I raised you, I fed you the best dwarf-meat and man-flesh. And you have become even more magnificent. Such courage. There is none other like you, Queek. You are unnaturally brave. Others think you freakish for leading from the front, not the back. But I do not. I am proud of my Queek."

Warlord Gnawdwell, Lord of Clan Mors

'Aye. The manling thought it clever to put his case to the Emperor with petitions and protest marches. Old Karl Franz chose to respond, quite sensibly, with cavalry charges.'

– Gotrek Gurnisson, history's least successful Slayer on how he met his Rememberer, Felix Jaeger.

"Oh most rotten of hearts, eater of cheese, ye of great and
circular intellect, I quail before you and your almost
majesty. Have mercy on our poor retched hides, for we are
beneath contempt, too insignificant to be struck down by
your vast-vast power..."
—Typical Clanrat Address to A Grey Seer

edit:

“Give me an enemy I may meet with strong steel and
stout oak in my hands, not a dagger in the night and an
accounting-book.”
– Boris TodbrInger, Elector Count of Middenheim

"There aint now't a cannon can do that a determined dwarf with a hammer can´t achive." - Old Durgrim Redmane Dwarf Hammerer

http://2.bp.blogspot.com/t8BpPJu94gpFICrVJQd5QJdGjaHzP9gOn3cJYQ5gNgJG_ND0jZB7kJXsNmxa1pr4mrfiTAbEpxhmKe710NKhUDy_5ZN5v3_0qQEsh8_28zT170tWqp4e_pChDsamYtp1HPMcrg=s0

The link is to a page from Warhammer Monthly with a quoted poem about Albion and the TT Dark Shadow Campaign. It might make for a decent quote. :)

Edit:


http://2.bp.blogspot.com/Qy5CL97nrjMiuV5d7R_b76HTtbthTEU4Jmo0DUbhEOEhEySCG6zT_kxQnhZM5bnc36lLNAKYqnICE-2Xa0NGzcgMDK8KDp4VUfsq6x-zBTH_OcmMG_tQGNO1PRpBvmmDmVh_Mg=s0

Another from Warhammer Monthly in the bottom right corner.

Edit 2:

http://2.bp.blogspot.com/pu2sbfID95CPx0nWuDg9fU-WMrmFkDUHoq4ARy3_7iKT4vCa36n-a1c9ViOpIhQVUSKpGw3n2YTXckfrdZ7-ugR5OcnUcFCLdHhYYHulkdVIZYrJff2YKB-Rfn5ulRAaNUfixw=s0

And another.

http://www.twcenter.net/forums/showthread.php?322281-Warhammer-Quotes-Project

This seems to be a good thread with a lot of quotes.

http://whfb.lexicanum.com/wiki/Quotes_Vampires

"Say, are not Beastmen the spawn of men and sheep?"
"Nay, them's Stirlanders you be thinking of..."

-Anonymous conversation (From Tome of Corruption, WFRP 2nd ed.)

There are those so overcome by their depraved lusts they lie with the beasts of the field. Those that lie with goats spawn the horned Beastmen; those that lie with dogs and cats give birth to the furred Skaven; those that sell their souls to Slaanesh and lie with snakes and toads give birth to Orcs; and, of course, those that lie with sheep give birth to Averlanders.

-Father Scrinster, Ulrican friar (From Children of the Horned Rat, WFRP 2nd ed.)

"Every human life is a candle in the darkness. It flickers for a moment, catches the eye, then is forever obscured by newer, brighter lights."
-WHFB core rule book 6th ed(iirc)

"We loves ta go a plunderin', across the salty seas. A killin' an a muderin', an' fightin' if ya please! Yes we loves ta go a plunderin', across da mountain sides! But when we comes ta do them in, dem stunties runs an' hides!"
—Ogre campfire song


"He cast his good eye over the weary regiments, their captains stood to the fore waiting for the order to advance. Blackheart noted them all, creatures of many races all driven to serve an insatiable lust for adventure, glory and most of all Gold! He would give them Gold!"
—Accounts of Captain Blackheart


"All for one and every man for himself!"
—Common mercenary wisdom


"‘Good, good! Dat’s what I want, a good story. Because I am going to tell you a good story. An’ I want you to take it wiv ya, and I want you to tell all da uvver ’umies out dere who the biggest and meanest and bestest goblin in the world is, you got dat? And if you don’t do it in pretty words den I’ll come and eat your liver while you watches, got dat?"
—Skarsnik as he commands the playwright Bickenstadt to write the story of his life


"An' then Bozgrot got 'it, standing next to me 'ewas. Got it right between the eyes, never knew what 'it 'im. Then da Boss wend down with three bolts stickin' in 'im. And finally, after we'd lost half da ladz, we actually got close enough to see 'em."
—One-eyed Sukslug remembering his encounter with the Marksmen of Miragliano


"We never had a chance sir. They came out of nowhere. Before we could turn they were in among us, shouting their chilling battle-cries as they cut us down. It's true we ran from them sir, but these were not men - they were demons on horseback."
—Gunter Frieshiem remembering his encounter with Al Muftar's Desert Dogs

"You were so magnificent when I found you, the biggest in your litter, and they were all large before you ate them. I raised you, I fed you the best dwarf-meat and man-flesh. And you have become even more magnificent. Such courage. There is none other like you, Queek. You are unnaturally brave. Others think you freakish for leading from the front, not the back. But I do not. I am proud of my Queek."

—Warlord Gnawdwell, Lord of Clan Mors

Whoops, just saw someone else posted this quote.

"I looked up into the sky and there I saw my doom, lithesome yet dread. What creatures were these? How many tortures would I endure before peace was mine? A thousand wretched forms united only by a hatred that never ends. Malign and savage to the last, they brim with bitterness for the works of Man."
—Bestiarie Malificent