I was intrigued when Spinoza kept coming up in discussion at first, but when i realised that all romantic philosophy and literature is built on Spinoza and Leibniz, I was a) less surprised and b) less interested. KP follows the line which says that everything goes wrong with Kant, no? In which case he needs a non-Kantian because pre-Kantian metaphysics, whereas I am happy with messy old empiricist rationalism a la Hume (or what I have read of him) or something more like dialectical pragmatism if that's possible. There are some great early C20th metaphysicians in the Spinoza line - my fav is Samuel Alexander - but I assume all bergsonism and process philosophy has Spinoza behind it somewhere. I once gave a lame conference paper as a favour for a pal arguing that Hardt and Negri were Spinozist theologians and we should read S. Alexander instead as his stuff was at least funny (I wish I had put it like this!). I'm sure there's much more to it than this and I am being a dullard from a philosophical p.of.v. but what the hey!