Here's one I just watched in Reply 1997 and loved! :D

"Men and women expect different things, face different sides and dream different dreams. The relationship between a man and a woman is of ever-lasting love and fighting. They get upset and console. They fight and make up. They hurt and they embrace. A relationship as complicated as a manic depressive disorder. But the hardest part is... it can't start if the timing is wrong. A relationship that is too complicated and too sensitive. There is one relationship that's as difficult, yet unavoidable."
Another one from Reply 1997:
"Being a teenager is a stormy period because we don't know the answers. We don't what we really want, who really loves us...Who we really love. We struggle to find the answer. And finally, when we miraculously find the answer, we've already become adults and undergo big and small goodbyes."
Ok so I'm not sure if anyone said this yet, but I'm obsessed with this one quote from To The Beautiful you:
"Miracle is another name for hard work."

Honestly this is so inspiring to me, I want to seriously find the person who came up with this quote, because it is so true.
[QUOTE=flo2blue;35365]
Kyohei(Yamato Nadeshiko Shichi Henge) : “You should worry about your insides getting uglier more than worrying about your face.” [QUOTE]

I love this one.

Not finished the series yet, but this line really made me laugh.
You're Beautiful
Taekyung: It is nothing, so stop imagining anything more. (Jeremy thinks about this) Taekyung: STOP IMAGINING!

Have others, just can't think of them. Will post more later.
I've got one I just saw in To The Beautiful You:
"So what if it's a girl or a boy? We're all human beings"
Adding to Becca's Reply 1997 quotes :

"Life comes and attacks you when you least expect it. It might be sadness, or extreme fear. At that moment, what we can do is accept reality and admit we lost. We don't know how life will turn out. There is no way we can avoid it. We just have to face it, and get hurt once in a while. But life sometimes thrills us with unexpected events. And gives us happiness when we overcome hardships. We never know how life will turn out. So we use all our senses to survive it."

"The only thing we can do for the people we love is to give ourselves up. Love makes you do what you normally wouldn't do."

"People have to be satisfied with an attainable dream. If you're greedy with unattainable dreams, you'll only get hurt. Empty passion only leaves you with heartburn. That's why unrequited love is foolish. However, foolish unrequited love can have potential. That passion sometimes causes miracles. And sometimes, dreams come true from a distance. While you may not achieve the dream, getting close gives you the chance to be happy. Of course, that's very rare. Unrequited love usually ends in failure. But it's also sad if you're afreaid and give up before you even try it out. First, do what you want instead of what you can. You only live once."

"People believe that they are born with an invisible red string tied around their finger. The string is tied to a person they're destined to be with. However, it's hard finding out who is waiting at the end. The string is tangled as the number of people tied together. As we untangle it, we get to see our fate. If the red string of fate exists, where will mine end?"

"The reason I like you? Because it's you. Just you. That's the only reason. I wish I knew. Then I could figure out how to stop liking you. If I can't avoid it, I only want one thing. To stay by you as a friend, unchanged. Here's to heartache. To love."

"There is no better time than now. That next time may never come. To talk about a next time that may never come when now is right in front of you. Life is too short for that. If you give up now because you feel too weak or lazy, there is no hope for a next time. If you love her, the best time to love is now. Approach her before it's too late. You must confess now. You never know what will happen in the future. Your next chance may never come."

"Liking someone isn't a choice. It comes from your heart."


And a few more in my notebook haha xD I wrote so many down!
"Life isn't easy, is it? You try to be happy quickly, but it doesn't work out."

Michiru, Last Friends
The princess man: Although i lost my sight, i retrieved my heart. Although i lost the desire to revenge, i got you instead. (seung yoo) seung yoo: If you follow me, there will be an endless road of hardship... Se ryung: Even if it's a road to death, i will still follow you...
Love the Reply 1997 & The Princess Man quotes :D
"Deep inside everyone's heart there lurks a devil. Whether to release that devil into the world, is an individual decision" - Dr. Yoon Ji Hoon, Sign
(My Prince) Mom: "Don't call me mom. Our family doesn't have wimpy men like you!" (Takumi-Kun 3: Details of beauty) Shingyoji -Kun: " Or maybe you want to test me?" Cracks his knuckles and then says, " Better learn some respect, first year brats!"
(Mother) "Please kidnap me again" *sobs* - Rena/Tsugumi
These are all making me quite sentimental.
"Actually...as long as you take each relationship seriously, you will definitely gain something in the end. These gains could be of happy and good memories, or even marriage. Even if the final outcome...is goodbye, we will gain something eventually, which is to have better understanding of oneself."-In Time With You
My very favourite, from Hana Yori Dango 2:

あの時俺が一緒にいた、俺が生まれた初めて惚れた女は...まきの、お前は俺の運命の女だ!
The one who was with me at that time, the girl I loved for the first time in my life...Makino, you are my destined woman.

It's one of the greatest scenes of the whole drama!!