Your relationship
A wish for harmony with others meets a wish to preserve a personal aesthetic. Discussing preferences separately from feelings for the person may help.
As romantic partners
Explaining a different preference together with why you like it can create a shared way to choose, beyond only accommodating or rejecting the other person.
As friends
Taking turns choosing a venue or a work to enjoy can give you a chance to introduce what you truly like beneath gentle agreement.
As colleagues
Sharing an example of the intended finish before listing corrections can move the conversation from pointed words toward practical discussion of the work.
What each of you brings
Yi (乙) (Flowers and plants): Flowers and grasses blooming with flexibility. A key theme is Cooperation・Flexibility・Persistence・Sensitivity.
Xin (辛) (Gemstone): A gemstone holding the light. A key theme is Aesthetic awareness・Sensitivity・Self-respect・Dignity.