What do Immortals tend to expect of their empowerees?

I've seen guides to getting empowered, and vague tips of what to do after empowerment (i.e., visit your god on occasion), however, nothing clear.

I've seen roleplay where the empowered character goes on to follow their god's religion, but there are many characters who get empowered by gods of different spheres, so it would appear that religion isn't an expectation. Or is it? Is it acceptable to follow a seperate religion than the sphere which you were empowered under, for example?

Any details would be appreciated! Thanks!

Splntrd