I see it this way,
BoY and decision has dark-sad vibe, this is shared with is this LOVE.
talkin' 2 myself shared the same vibe with Rule, something that's really in your face.
1 LOVE has this playful-dancey rock vibe as well as identity, while GAME is more between t2m/Rule and BoY.
Bye bye darling is not dark, it's a more positive(?) GAME I guess a teeny bit lighthearted.
About you is also dark but I cannot really put in which kind of vibe does it give, like End of the World.
alterna is dark but more like creepy and a bit sad.
That's how I see some of her rock songs
Now that people mentioned it, I do hope she replace decision with NOW&4EVA