For me it was Sora Aoi and Yuuna Mizumoto. I knew that Sora was popular but my preferred body type was more like Sarasa Hara, Megumi Shino, Aino Kishi, Saki Ninomiya, Yuuki Natsume as an example. But then I saw one scene of SOE-339 that was subbed in English and then I started collecting her...