All of them broke my heart.
Cedric - Because he was a really nice guy, and a Hufflepuff (-is a Hufflepuff too-). But I think some of the reactions to his death were overplayed in the movie. I liked Fleur's reaction, though. Just what you would expect of a girl like her (don't get me wrong, I ADORE Fleur). Harry's was okay. Cedric's dad made me laugh. >.<
Sirius - HEARTBREAKING. Honestly. That was a low blow from JK Rowling. D<
Dumbledore - Eh, what upset me was the scene in the caves. That made my heart hurt. Dx
Hedwig - I was SO pissed at Rowling. WHAT WAS THE POINT!? There was no point. She just decided to kill the damn bird for no reason. I honestly hated Hadrig at that moment. ._. I've never liked him, but he didn't give a damn about Hedwig. I know that his job was to get Harry to safety, but really?! He could've acted like he cared that Harry's best friend since he was ******** 11 was dead. D<
Moody - OHGODICRIED. I still believe he's alive. If you can't find the body, they're still alive in my mind. DON'T BELIEVE HE'S DEAD FOR A SECOND. Look what happened to Wormtail.
Dobby - I was like "WTF. D<" Dobby was such a cutie. MY FRIEND ACTUALLY LAUGHED ABOUT DOBBY'S DEATH. I WAS SO MAD.
Fred - I bawled. For quite awhile. Fred and George were always my favorites. Dx They're what got me into Harry Potter. Did you know that? I fell in love with them instantly in HBP. Tonks helped too. So did Luna. But it was Fred and George that won me over.
Tonks and Remus - Tonks has been my favorite character since she entered the series [AFTER Fred and George, of course...], so I flipped out when I found out she died. It was uncalled for, and I kind of wished Arthur died in OotP so Tonks and Remus could live. ._. -bad person- Remus was also a quick favorite. He was so sweet and caring.
Colin Creevy - Until I find out how he died, I refuse to accept his death. I LOVED Colin. He was MY little bishie. -loves her fanboys-
Snape - Honestly the most heart breaking. When I was little, back when the first HP movie came out, I instantly liked Snape. I have NO clue why. I didn't like him enough to get into the series, but I liked him. Not once have I believed Snape was evil. I LOVE Snape, and I cried for a while over his death.
Bellatrix - LAUGHED. Hard. "NOT MY DAUGHTER YOU b***h." I wish Ginny had died instead of Fred, but still. I adore Molly. I ******** detest Bellatrix. She killed Sirius, Dobby, AND Tonks. Not to mention tortured Frank and Alice into insanity. I HATE HER SO DAMN MUCH.
Voldemort - Again, LAUGHED. I was like "PWNED b***h." xD
I'm bound to be missing some people, but what do you expect? I'm not God.