I think the answer to your question would depend on how much your grandmother meant to you. If your gram loved you a lot and you loved her,then I doubt OCD has anything to do with it. Also, some people are more prone than others to invest sentimental value in things. I don't think one style of personality is better or worse than the other. My father was very sentimental about things that he connected with a loved one, while my mother was not. She was not less loving or less warm, by the way. But my Mom did discard a few things that caused my father to be very upset. I think she did not expect that his feelings would be that affected because she could not imagine feeling that way. So it may be helpful to just tell those who don't feel as you do that you need them to respect that you feel as you do. Also, tell them that they don't have to understand your feelings, which may be impossible for them, but just to respect yours.

I really like the idea of a memorial area. I've done that in my home. Gradually, I've been able to part with things. And keep what is most special.