I keep my specific spiritual beliefs to myself.
The main reason is because they are constantly evolving. Ultimately, the answers to most spiritual questions are unknowable (at least within my limited human experience), so I see my "beliefs" as more like "my latest guess." They are constantly subject to change, given new information and experiences.
While my beliefs might not change in big ways all at once, over time the small tweaks and changes do add up--so if I told someone what I believed today, it would likely be very different two years from now. And many people aren't comfortable with that--even if they don't demand you follow a specific religion, they still expect consistency of belief.
So I rarely talk about my spiritual beliefs unless it's with someone else who understands that they are fluid and changeable, and why. There are a few core beliefs that have stayed stable over a long time (that we are all ultimately one, that we can choose our experience of reality, and that death is nothing to fear). But instead of talking about these beliefs, I've found it easier to simply act from them--to conduct my life accordingly. And if someone is interested in how and why I conduct my life as I do I'll discuss my beliefs, but only to a degree that is relevant to that situation and the person's understanding.