whats do you ladies think?

so my family has always chosen godparents and i want to keep that tradition going with my children as well but i'm not sure who to choose and i dont want any feelings to be hurt when i do make my decision. I want to choose my younger sister...i know my boyfriend is goimg to want to choose his sister but she lives on the other side of the country and his family isnt as close knit as mine. ive thought of two solutions other than having my way regardless of what he wants: either we pick someone who is not a family member or choose both of our sisters but have only my sister fill out the for to be a legal guardian should anything happen.