Fyi, I also listen to a broad variety of music, though mostly J-music, J-pop, J-rock, J-R&B, J-rap. SCANDAL just at the top of my list.
I have a short playlist that I keep on playing all the time while I'm doing my other tasks, working, reading, writing, etc.
And I do know what u mean by over dosage that leads to destruction of interest. It had happen before. I would certainly take a break and mix in with other artists songs.
However, with SCANDAL, if I ever do feel this way, watching their videos, i.e. interviews, behind-the-scenes, etc, would definitely revived my interest. and it did.
P.S. SCANDAL isn't even the most played on my itunes. at least a dozen songs on top with each have a play count exceeding 1300, all newer, or at least I obtain them after the latest SCANDAL CD, BA.