Christian theology is also, I think, extremely challenging for many of us as it provokes an almost visceral reaction based on our prior interaction with it and its involvement with contemporary politics.
Joshua, your division into practical and theoretical is useful for considering Christian teachings as well. While the theory is for the most part fantastical, from time to time I find myself thinking about how religion in general is ubiquitous throughout history and how it must have practical benefits to its "practitioners" in order to be so sticky.