[Raleigh]

They all sounded the same to me except the NANA releases. All of them were ballads or soft pop.

And some of the stuff you mentioned are not experiments but just random stuff thrown around. J-Pop, Western and ballads are not experiments. They are regular J-Pop and almost all J-Pop female singers constantly churn that stuff in the J-Pop Industry. Instrumentals is not a genre or an experiment. And I've listened to some of her blues/reggae stuff and it sounds very much like her regular stuff with some minor tweaks.

If you seriously want to see some bold experiments see someone like Ayu or Hitomi Shimatani who have experimented with a load of genres. Anyway there's no need for Erika to experiment. People like her pop-rock and she fits well with that genre without sounding like a chipmunk so I'm happy with her direction.