I honestly also thought "the b-side topic again, we just had it in the old thread" while reading.
Can't pick my favourites of her b-sides, seriously, she has to many great ones. I can always choose one and enjoy it!
But I guess one, Good☆day, Aisho, girls, Run for your life and HEAT feat.MEGARYU are somehow my all time favourites!
I still don't feel Pop Diva that much as well. Listened a couple of times to it, but the chorus is just too shouted and that's a pity, cause the verses are good.
But there is the b-side Black Candy and on the album Lollipop, Hey baby! and AT THE WEEK END (I'm 100% sure I'll love it). So I don't care that much.