I think your taste is similar to mine so I'll just go on and suggest what I like from b singles
from
beginner: boku dake no value
from
so long!: Ruby, yuuhi mari
from
hebiro single: namida no seesaw game
from
koisuru fortune cookie: ai no imi wo kangaete mita
from
suzukake nanchara (their last single): kimi to deatte boku ga kawatta
from
kaze ga fuiteiru: vamos
from
UZA: tsugi no season
from
gingham check: nante bohemian, yume no kawa
from
sayonara crawl: how come? , ikiru koto
from album: GIVE ME FIVE, romance kakurenbo, hashire! penguin, omoide no hotondo, scandalous ni ikou, sakura no hanabiratachi (maeda atsuko solo)
A singles that you should check if you haven't ^^ : bingo!, 10nen sakura, baby!baby!baby!, oogoe diamond, gingham check, eien pressure!