I actually liked Nacchi not from her being a MM member, but actually seeing her in the dorama Aiken Rosinante no Sainan when I was in HK. At that time I didn't know that Nacchi was in Morning Musume (because I had no intent of knowing MM in that time), and then later on when I got my interest into MM I realized that "this girl looked similar to this girl I saw in a dorama", then with some searches I found that she was Nacchi!
but ya.... right now aside from her songs and performances in H!P I saw all her dorama and had a copy of each dorama she's in!
Aside - at that time there were these 3 girls in my school (elementary girls) who performed "Chu! Natsu Party" in the school concert and I didn't know that song was from H!P sang by Rika-chan, Aibon and Ayaya ~ ~ ~
but at that time I knew the song very well (also the dance) because I was the stage manager + head technician and had to listen and watch them practice everyday!