It's my weakness too!
I have a voice similar to Megumi (obviously not a professionally trained!), but with the clear, pure notes that sadly lack emotion. The song just sounds nice to the ears. Then there is my best friend who has a lot of of emotion, but has those acquired taste voices, kind of like May'n (but again not really as trained either). She wants the song touch people's hearts way. It had interesting effects when we sang in the high school choir.
...I just realized I'm a shy Taurus like Ranka and she's an adventurous Sagittarius like Sheryl.
But I honestly resemble more to Nanase, sans purple hair. 