Try to avoid picking pointless/banal/uninteresting songs. Go for the utter rock bottom.
I plan to ignore some of my top 10 and put others instead, simply because I don't have anything interesting to say about them.
1. Artist: T's Music
Song: 石田三成のテーマ
Reason: This being an orchestra, or something like that, means there are no songs containing vocals. That, however does not exempt it from having a few irritating/repetitive songs. The melody in this one is an eccentric blend of electric saw meets electric guitar. The same beat loops endlessly thus making this song one of the few unpleasant listens from this artist(s).
2. Artist: ルルティア
Song: RESONANCE
Reason: I can honestly say that she is my favorite artist, and has sung most of my favorite songs. However, this new album leaves something to be desired. Her voice has lost some of its fluidity. In this particular song, the melody just isn't as ethereal as usual. …