Do you incorporate faith/religion in the Sims?

Not really, I'm an atheist myself and had some negative experiences due to religions and usually try to keep my game is neutral as possible considering religion. Sure, I have some sims I imagine being more religious than others, but that's it really. This doesn't apply to holidays though, I always keep Winterfest (which is literally just Christmas) in my save, because it's a holiday everyone in my area celebrates, no matter if they are actually religious or not.