Read a lot of the more famous stuff, but one that simply hit me right at home and is easily my favorite series. Incarnations of Immortality by Piers Anthony. He has a lot of books and they're pretty good on their own, but nothing matches that series for me (the Xanth series isn't bad at all, just not the same). The last two books of the series (written well after the rest) are pretty "meh" but the original group is just great, takes a neat twist on things. Without giving anything away outside the first chapter of the first book, the idea is the aspects of "gods" that control different metaphysical aspects (god of death, war, time, nature, fate, etc) are not individuals but simply professions taken on by people who assume the role through different mechanisms. By far my favorite book series, above Tolkien's stuff, which is saying a lot (I'd say above JK Rowling too, but honestly I hate that garbage but I accept that's an uncommon personal taste).
