On the other hand, I disagree with many of his arguments, especially the ones he uses to defend Christianity.
Could you describe some examples of this? It's the first time I've heard this criticism of Lewis, and I am interested in which arguments you find are his weakest.
Granted, I haven't (yet) read the whole C.S. Lewis canon, so I may not have come across all of them yet...but I'm still curious as to your take on them, if you find him at his weakest when he defends Christianity.
I love him, what I've read of him. At the end of the day, I think my favorite thing about him is how great a storyteller he is. This comes out in both the Narnia books as well as the theology books I've read thus far.