I used to wear a bindi most of the time, once I got married. Since I tend to perspire a lot, I'd wear sticker bindis, large-ish, rather than use powder or liquid bindis. The bindi was something I never even thought about - it was just there, stuck on my forehead, unless I was wearing 'western' attire.
A friend of mine used to wear her bindi even with western clothes, insisting that it was a part of who she was. For decades it was a non-negotiable part of me, something that I automatically put on and bought and replenished supplies of when my stock was getting over. But, for the last couple of years, as a considered political statement, the bindi is no longer a part of my attire.
I do not wish to be identified, at sight, as a member of a particular religious community. If I'm out in public, I am just another Indian woman, wearing whatever attire I choose to on a given day. The people who know me do know who I am, and I really don't care about those who don't. Neither do I wish to announce my marital status to the world at large. On a recent visit to Delhi a young niece of mine noticed my missing bindi, and asked me about it. My explanation made sense to her- she realised it wasn't just a random whim.
I think bindis look really pretty, and, until I thought about it, I really did like wearing one.
But in my own small way, this is my way of expressing solidarity with all Indian women, not just the ones whose religion expects them to wear a bindi.