I used to find Alan very very strange. I was curious about such a creature but in the end found no big love for it. Uh oh, Lewis, you failed.
Now I realize how, as some people said, "preachy" this series is. Wow. Yeah, very. The good thing is that if you don't know it is "preachy" beforehand, especially when you read it in your childhood, as it was in my case, you will simply enjoy the fantastic and magical world in Narnia. You know, I did not think that much about good and evil, creator, sacrifice, resurrection, redemption etc. I just like the book for the simplest reason: adventure.
But I quite doubt I could still enjoy so if I re-read the series now. All seems too vividly Christian.