Both Buddhist and "a good Christian woman"... The Buddhism I could jive with as it's more a theology than a religion, but I was stumped that someone could decide I was Christian just because I care about the welfare of others.

I come from the UK, so that, as in most of Northern Europe, everyone assumes you have no religion until you tell them otherwise. Though there are a few of the older generation still living who assume you are a low level christian by default, but even they would never assume that much up front without asking, that would be considered at the very least impolite.

People typically assume the volunteer work I've done in Kenya is Christian missionary work when the reality is that I've always gone on my own and am vehemently against making assistance dependent upon conversion.