#1: I know it's Doraemon, but but- a little more... control wouldn't hurt.
#2: Suicide. +1 for trying to sing this and did it. but -1 for not trying to win
#3: Whisper it. Reff is great, though.
#4: need more power on some part of the reff.
#5: seriously lacking in power and control. +1 for trying. +1 for K-On!
Mio's bass is as sexy as ever.
#6: Not... wailing(?) enough. (Idk the right word, but I can't feel the song meaning in the singing.)
#7: Too cutesy it's not "shoujo" enough.
#8: A guitar would have worked.
While there's nothing wrong with the technical stuff itself, imo the singing doesn't blend with the bg sound. But not bcs of the recording technique, but more like: it's the wrong instrument for the voice. In singing, it's the instrument that has to follow, for the voice is never wrong. Thus I say it should have been a guitar.
#9: a bit more power, a bit more control would have made this more... sexy. But she did song right, the singer.
I'll edit this again later. Need to listen in a more quiet environment. Especially for #7 and #8.