It shouldn't be something one should worry too much about. Then it comes across as forced, or trying too hard. Just be cool with it. Fluent. Smooth. I love Korean food, movies, socio-cultural facets, and history. Doesn't mean I ponder endlessly about how to approach Koreans in [downtown] Annandale, Virginia (Koreatown) when I take a visit there. A simple "hi" is often a wonderful conversation starter. As a Desi, the last thing I'd want is someone who I don't even know to randomly come up to me at an Indian or Desi grocery store and ask about Hinduism, India, and which Indian state I'm from - especially if the questions seem rehearsed.