I hear ya with regard to not knowing what to talk about at household gatherings.
In certain real ways, my relatives are not my real family. That's not to say I don't care about them, but my connection with them is superficial and not of the soul. We live in entirely different worlds, my relations and I. I care about them, but I'm distant from them due to the very nature of our various lives and paths.
I'm the only alternative spiritualist in the gathering of relations--my distant uncle is an atheist, my distant aunt is a devout Fundamentalist Christian as is her daughter, one of my cousins. Their #### is hardly ever around, seeming to be out of the house when he's not out of the country, and as for my immediate relatives:
My sire (paternal unit) is a Hungarian Unitarian with Calvinist ethics--and he is pretty fundamentalist Calvinist in ethics and in belief of what leads to Hell. He thinks the stories in the Bible are just stories but that ethically it's right on about homosexuality and paganism and spell-casting, etc.
My dam (maternal unit) is an atheist with some agnostic leanings.
My oldest brother is completely non-religious after having decided against Catholicism, and my second eldest brother is mostly Taoist and way too left-brain oriented for me to discuss spirituality or religion with him much.
So although I care about my relatives, I really don't have a "family."
Love and peace,