My favorite part of any of the "Gods of ..." books are the little bits of mythology, stories about the gods and their adventures. I feel like that helps me get the feel of them better than any stats or special trait, etc. One thing I'd really like to see is a book, like an actual novel, with full stories about the gods. No crunch. Almost like a "Bullfinches Guide to Inner Sea Mythology." For whatever reason, I'm not a huge fan of in-world fiction (nothing against it, just not my thing), but a book of mythology would be 100% useful to me as a GM or player in adding depth to my characters. Look how many references we have on a daily bases to Greek and other mythologies. I'd love to be able to drop those kinds of references in games, or even design adventures that echo the Inner Seas's most famous myths.