nagisakaworu:
You know…
When Kaworu says “I might have been born to meet you” in the tv series he has this smile on his face that seems just amazed and fascinated.

Because Kaworu and Shinji are very much in puppy love here. Kaworu is looking at him like this because he’s absolutely infatuated and has a lot about left that he wants to discover about Shinji and his glass heart. It’s a straightforward gesture in terms of its contextual meaning and purpose.
But compare that to when Rebuild Kaworu says “I really was born to meet you”:

This one needs a gif to get the point across because it’s all about Kaworu’s body language, wheras in the previous incarnation he was lying still. He way he looks at Shinji and smiles is more subtle and softly admirative, and he seems relaxed and comfortable yet still excited. But it’s mostly the way his eyes are somewhat narrowed and downturned initially, but he looks up and into Shinji’s eyes after he speaks, that gives the impression that he’s thinking the opposite about Shinji this time around. He doesn’t convey that sense of experiencing something big and new and intense – he knows Shinji completely, and he cherishes him because he’s reminded of that familiarity; that Shinji is still the boy he fell in love with then. It’s not simple infatuation here, everything about the way he carries himself perfectly gives the impression of someone who was willing to wait years to be with the person they love.
Basically what I was thinking is this…
When tv series Kaworu says “I might have been born to meet you”, it’s as if he’s saying “you captivate me, I want to know everything about you”. When Rebuild Kaworu says “I really was born to meet you”, it’s as if he’s saying “I missed you so much”.