A hearty second to Lion of Judah's comment "...soap need not be complicated and that three things are needed for a great bar..."
I have wavered back and forth from simple recipes with 1-2 oils to more complicated ones, including the interesting "odds and ends" batch I made recently to get rid of the little bits of various oils that were accumulating in my ingredient stash.
What I haven't been too interested in doing, throughout all my experimenting, is using expensive "luxury" oils in my soaps. I would rather use these oils in my lotions, balms, and body oils. A small amount of an expensive oil will make a lot of lotion, I believe my skin benefits more directly from the beneficial properties of the oil, and most of it stays on my skin rather than washes down the drain. --DeeAnna