When I was first getting into the Vocaloid fandom, I searched up Miku songs on youtube, and it was always Miku. However, I saw in the related videos other versions of "Love is War" and decided I may as well try a few other vocaloids. I enjoyed Len's version more than Miku's, which lead to me searching songs sung by him. Unsurprisingly, I finally heard Rin (who I hadn't bothered to click on before) and now they're both my favorites.
So, what about any of you? What's the song that made you start to love them?