Love this mod! I'm really only in it for the secrets though, but the other additions are nice. Especially the skin-to-clothing reactions. I can make sentient skin clothing with the help of my good friends the night trolls.
I've noticed one thing about worldgen: When a person begins to seek immortality, they will begin worshiping different gods to learn their secrets. But because not many of the secrets actually give immortality, the person will keep collecting secrets until they get vanilla necromancy, usually. Then the person will take all their slabs and go build a tower. Others will come to the tower and become apprentices. The apprentice gains all the secret the master knew, plus whatever secrets the apprentice managed to gather before coming to the tower. Towers become an adamantine spire of secrets, filled with immensely powerful magi and books of all subjects. I find this to be awesome.
Bug: Female bison, lacking a CASTE_NAME tag, are called nothings.
Also, how good is titanium for shields? I'm carrying around a bronze and a titanium one, and want to know which one to drop.
Also also, I thought being immortal barred you from gaining secrets, but I became a geomancer after becoming a vampire. I think adventure mode vampires are kinda bugged anyway, as I've passed out from pain and woken up again despite NOSTUN. Ah well, at least I can still become the god of magic I always wanted to be!