Interesting topic. I know that I used to annoy players when I played religious classes (cleric/druid/paladin), because I would often proselytize the players and NPCs. My current group has had less issue with that, as my druid had several interesting debates with a cleric in a Thule campaign about the value of thousands of lesser gods (forest/nature spirits) vs. a handful of powerful ones (the 12 or so standard deities).
I considered asking my group... but honestly, I'm afraid to hear the answer
This, I'm a devout follower of Helm, the watcher and the god of the wounded warrior and I bring it up all the time, like when I'm using his power to heal you or summon a magic weapon to save you. Of course my character also believes and has been kicked out of his church for believing Helm is also the god of the sex worker.
Oddly with my group its the constant referencing of a god saving you that has them the most upset.