If i dont like anything that my ammi gets me, i usually tell her. She once spent a couple of hundred dollars on buying me some jewlery that i knew i would never ever wear. I asked her to exchange it for something else. At the moment she was offended but she eventually forgot about it. And every single time i wear the replaced item, i get compliments on it.
You are raised by your ammi, so it highly improbable that you will dislike things given to you by your mother. Most of your tastes are actually reflection of your mother's tastes, leaving aside the differences in taste because of age.
Also if you don't like something from your mother, you will never get offended.