Talk:Akuno-P/@comment-24.7.9.107-20120411195758/@comment-5051846-20130513163700

Possible reasons:

Although they have had recent updates, the V1 sound of most of Meiko and Kaito's songs could be unappealing. It is quite difficult to find good tuners of them.

For the Character Vocal Series:

They were all voiced by voice actors and aimed at having a personality; not sounding realistic. If you don't like this 'personality' or prefer realistic sound, then you may find them annoying.