Here are some, how I remember them best.
"Aw crap, its a Tin plan." - Puffy60987
"No, no vamprism, just death. Simply death." - Luthien
"Your going to die!" - Monmarty, accidently wrong chatting broadcast."
"I dont know what real life is." - Tom1804
"HELLO SUCKERS" - Watchdogeditor, upon attacking Erabor with millions of arrows.
"-places sticker on foarhead, which admits a bright light. Ten seconds a meteor hits you, blowing you into a million bits, drain your power source, and fly away laughing on my reindeer-" - Some random dude in Regalia.
"The skinny kid in the black pants dies first." - Lady_Heretic.
"Your living the live, next thing you know your carrying a shirtless guy home from a castle full of demons." - Puffy60987
"Should of brought your bow!" - Watchdogeditor as he enters Zulgroth, sniping a zombie in the face.
"Everbody twerk at uspawn!" - Another random guy.
"I got a new rp character guys!" - Puffy60987, after changing her rp character for the fith time in one week.
"Watchdogeditor dies tonight! -MyDareMan was shot by Watchdogeditor-" - MyDareMan.
"I'll give you a five second head start. 1, 2, -Tin77 was burnt to a crispt-" - BigBellyBuddah
"f;Guys, I have a idea. Lets get naked." - TiroTypo777, pretty sure it was him or some one else in general...
"What the hell are you doing? Stop the madness!" - Desmond_Diseos. (Or however the last name is spelt.)
"Down with Crimsons, up with baccas!" - Turst something, I forget.
"Sir, if you dont leave the area now, I shall burn you to a crispt, then burn your ashes, and then dump them in the ocean." - MrHappyTinkles
"Tin, put on some pants. We dont want that thing being thrown in are faces." - Prestatamore.
"I shall not let this man die tonight! Well, tonight!" - Tom1804
"What? This is a wall? I thought that was a you. -is facing a person-" -Katiesc.
"I'm pretty sure we all die in the end." - Puffy60987
"Your arrows do not effect me. The girl shall die. -looks at Katiesc-" - Nikotakanawi.
"And thus, Tin77 died by falling off the top of the Crimson HQ, while making a unsuccesful break in with ender pearls." - MonMarty, in general chat.
"So, if we go one way, we die, and if we stay here we die. Oh, what a win win situation." - Katiesc
A lot more then some, these are my favorite quotes of all time in Massivecraft, even though it may not be exact or may be the wrong person. Correct me if I did it wrong.