robconley
Hero
Hmm...
I just let the players that want to have religion part of their character's field of interest make those details themselves. Saves me a lot of time as GM to focus on a better game and the player feels good about contributing.
If you ever built a temple as a site for a adventure, described the rooms, and populated it; you just created many of the elements of that deity's religion.
And you are right about allowing the player to make up the details for something you having. Unlike you and your NPCs, the player has to deal with his religion on a day by day basis. So elements that are not that important to creating an adventure are important to running the character.
However none of this is about describing the diety as an NPC.
Sure the fact that describing Thor uses a Hammer suggests that hammers are an important implement to clerics and followers of Thor. But if you have started with the religion, at some point you would put down that the priests use hammers in their rituals . But along with that you would have a lot of other useful information for running an adventure involving that deity.
I will say that describing a deity as a NPC is a lot easier than coming up with a religion. People just relate better to people than some nebulous organization. But in this case is it the description of the nebulous organization is going to be a better tool for creating adventures.