The angle this question takes for a polytheist is a bit different.
Presuming that various gods bother to have expectations of a human, those expectations are inevitably going to conflict as the gods have different natures or essences. For the polytheist, it's about asking which gods you want to develop relationships with, whether or not one believes there are expectations involved. You can only invest your time in so many places. It's not about the rewards, it's about showing proper honor and devotion to the gods you choose to worship.
Most of the gods I actively worship lack expectations as they are not capable of forming any. Expectations are, for the most part, a silly human thing - it's humans projecting norms onto reality. The gods I honor are reality. I mean, I suppose from a certain point of view you could say the Spirit of Gravity "expects" you to splat on the ground if you walk off a cliff, but... eeh... not how I'd frame it.