What are methods you liked using or seeing for handling gods in world building?

There seem to be many ways to handle deities in fiction. Some people have one deity or one pantheon for the whole setting while others use multiple pantheons, maybe for different people. Some worlds and worldbuilders let gods exist in and affect the world directly while others leave them up to interpretation with no confirmation of their existence, as well as little to no actual involvement in the physical lives of the characters. Some exist from the beginning of time while others require belief to maintain existence.

In various fiction media or even your own world building, what are some ways of handling deities that you liked seeing? What styles did you not like? How do you handle your own deities? Are there multiple groups of deities for different cultures, or do they have a presence in the whole setting as seemingly the only deities? Can mortals become deified?