When she buys me berries, if they're useful for when it comes to removing EVs or for healing status effects, then I don't mind. It helps me out in the long run. However, for the past few times now, all she's bought me were berries so it leaves me with a blank face asking, "Berries, gosh, why so much?" :|
I won't complain though as she's gotten me some useful items such as the Moon Stone, Choice Scarf, and a Muscle Band too. Plus, like MrGhost mentioned, the bank feature is too good to pass up.