As the titles says, which was the exact moment when you started shipping Delena? 😳
For me, its a mix answer.
From the 'Pilot' episode, I was attracted to mysterious Damon entry and foreshadows of crow with the Elena and Bonnie's speech and all. So, I knew that Stefan won't last forever in Elena's life. I was rooting for Damon and Elena's story from the beginning. Mind you, I have never read books, and not even planning to. It was all natural instinct that Damon and Elena could be perfect. And there were moments when I really started liking them when Elena slapped Damon and Damon did not kill her, that was my clue. I was impressed. And after that there were all scenes, one by one, I started liking them. 😳
BUT the moment which sold Delena for me, for like eternity, was Miss Mystic Falls Dance. There was something about that dance, it was passionate, magical and just amazing. I was spellbound and I was sold. I knew in that exact moment that whatever happens, I would ship Delena till the end, whether they are endgame or not. For me, TVD became Delena's love story from that EPIC dance. 😳