It has been said, but yes, Kodomo no Jikan. There were many shows/manga/eroge that I liked that had much loli, but it wasn't 'til Kodomo no Jikan that I could call myself a lolicon. After watching it I had a strange urge for DFC and such. I even have a Rin Nendoriod now ^^ but yes, I love loli (at least in 2D).