In every game there's an unforgettable Quote or Phrase:
Here are some in no perticular order some i remembered some i found on the net

1.Don't make a girl a promise...if you know you can't keep it. -Jen Taylor as Cortana in Halo 3
2.The cake is a lie. -anonymous corpse in Portal
3.Finish him! -Herman Sanchez as Announcer in Mortal Kombat
4.Thank you Mario! But our princess is in another castle! -Toad in Super Mario Bros.
5.Most people think Time is like a river that flows swift and sure in one direction. They are wrong. Sit down and I will tell you a tale like none that you have ever heard. - Yuri Lowenthal as The Prince in Prince of Persia: The Sands of Time
6.Delta squad is in your house, %!&&#! You hear that $#!&? You grubby-ass %!&&#@$ are goin' down! Like way down. Dead down, so down you ain't even gonna know which way is up! Your asses are gonna be cryin' to your skank-ass queen, "Oh, mommy, don't let the bad man hurt us!" F#&% you! We're gonna whoop your mamma's ass. Whoo! -Mighty Rasta as Augustus Cole in Gears of War 2
7.I'm coughing up blood that ain't even mine! -Fred Tatasciore as Damon Baird in Gears of War 2
8.Get over here! -Ed Boon as Scorpion in Mortal Kombat
9.Hadouken! -Ryu in Street Fighter II
10.Are you a professional moron or just a gifted amateur?! -Young Maylay as Carl Johnson in Grand Theft Auto: San Andreas
11.It's a-me, Mario! -Charles Martinet as Mario in Super Mario 64
12.Do you have a plan to go along with that grenade? -anonymous as Nathan Drake in Uncharted 2: Among Thieves
13.Find him... and close shut the jaws of Oblivion. -Emperor Uriel Septim VII

"Oh no, a dragon!"

"This is the part where you fall down and BLEED TO DEATH!"

Some notable ones I've heard in recent memory:
"The stupid [censored] actually went it." -- Geralt after Dandelion voluntarily visits the succubus.

"Deeecapitatiooooooooooooooooooooooooooooooooooon." -- Brutal Legend

"The dead don't care." -- Kane, from Kane and Lynch 2 (a criminally underrated game)

"SKRREEEEE SKREEE SKREEEE." -- EVERY DAMN CLIFFRACER IN MORROWIND

"Cheese for everyone!" Sheogorath, SI/Oblivion

For Skyrim:

Probably various dragon phrases (Fus Ro Dah seems to already have caught on), some quotes from Esbern, hilariously repetitive guard phrases (CRIMINAL SCUM), Daedric prince quotes, phrases of the giants, and I also heard something about talking to dragons and that not all of them are evil, so that'll be somewhere in there as well.

sence were going to die,you probally want me to say that iv always loved you.but i dont.i really really dont.

This is Berk. It snows nine months out of the year, and hails the other three. What little food grows here is tough and tasteless. The people that grow here, even more so. The only upsides are the pets. While other places have ponies, or parrots... we have dragons. -Hiccup, How to Train Your Dragon

SPAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACE

"Noman is killing me by fraud! Noman is killing me by force!"

“If everyone gave up as easily as you, I’d almost never have to get my KILL on."
~Gharug Gro-upp

"But... there is one they fear. In their tongue... he is 'Dovahkiin' - Dragonborn!"
A child telling the whole town about a book he read.

Most people would leave, but not us. We're Vikings. We have stubbornness issues. -Hiccup, How to Train Your Dragon

"Stop! You Violated the law!!"

I hope I never hear that sound again... unless I'm playing Morrowind...

Oh who am I kidding Cliffracers are awful.

"drovahkinn, what is best in life?" "Crush you enemies, see them driven before you, and hear the lamentation of the women." < Conan.^_^

"If one strives to understand another's mind, they will never understand their own."

There can only be one.

http://www.youtube.com/watch?v=q6cyDsuNx_U!!!

This Is SPARTAAAAHHH!!!!!!

Stop right there, criminal scum!

I am the law!!!!

"Oh, yes I'm sure it's terrible for you, dear, but shut up."

im gonna paraphrase the first one since i forgot how it went exactly

"im going into the spiders lair...dont try to stop me...okay going in..."- brutal legend

"when life give you lemons make lemonade, and find someone who's life is giving them vodkka and have a party"- ron white, blue collar comedy tour

"you cant break a man teh same way you break a dog, or a horse, the more you beat him the stronger he gets"- the jackle, farcry 2

"they call me...mr. sunshine" mr. sunshine, saints row 2

By far my favorite quote from any TES game or hell ANY game for that matter:

"I heard a rumor that your an idiot. Any truth to that?"

what about maiq quotes

And when the time comes the whole of tamriel shall rise from the ashes, In homes everywhere cheers shall rise... WonderfulAngus.