Gor is an interesting place, I suppose, but it could have been a lot better had someone else wrote it. I found all the Gorean books I have read to be tedious to read.
If you want to get an idea of one of the many lifestyle types in BDSM, then by all means, read Mr Norman's series. Once you do, you might discover that some of the people you work with, take the bus with, or even hire as doctors and lawyers are Gorean. But don't read it if you're looking for any kind of literary art work.
Unless there's a literary category for truly badly written books.