We all have them, those core things we can't relinquish for any kind of partnership that would lead to cohabiting with a person of our choice. It can be ethics, a living habit or something else entirely that you sincerely can't give up or compromise. For me it's keeping cats. A lot of my future plans involve having my cats with me, to me they are precious companions. Even if the person I might get serious with is allergic to cats, I will value the presence of my feline companions higher. How about you guys? What kind of thing(s) would you never give up? And no bickering! We all value different things, what might be silly to one is important for someone else.