It's not the gods, it's the interpretations people put on them. For example, Christians, Muslims, Sikhs, Baha'i, Brahmo Samaj, etc are, in theory worshiping, the same god: how many supreme beings can you have? But the Christians say he commands you to love your neighbour, while the Muslims say he commands you to make war on your neighbour if he won't convert.
It's the same with myths. Some are symbolic expressions of truth, some are just stories. You don't have to reject the gods of Greece because you don't like some of the myths: do what Plato did and reject those myths.
I find it difficult to think of any real gods I couldn't worship (as opposed to the made-up ones of Wicca), but I can think of a lot of religions I'd draw the line at.