Aslan I wouldn't have chosen him as a favorite when I was younger but lately I have realized how much his character means to me, he is either in my favorite scenes in the books or, if not present himself, he is being discussed by the characters who are. 

Lucy Another character who has worked her way into my heart. As a young girl I thought she was boring compared to Jill or Aravis but as an adult Lucy is the character I most want to emulate. Her faith in Aslan and the love she proffers to everyone she meets are truly inspiring.

Edmund He went from being a treacherous, spiteful, lying boy to King Edmund the Just. His love for and trust in Aslan was second only to Lucy's and I have always appreciated how he never forgot the sacrifice Aslan made for him.

Peter The older brother I wished I had as a child and the sort of leader I most admire. I've always wished he had been in more of the books.

Jill Feisty, flawed, feminine. The girl character I related to the most when young (except for her head for heights, I'm with Eustace on that!)

Puddleglum His unrelenting pessimism makes me smile but his display of moral and physical courage against the Emerald Witch will always be one of my favorite scenes in the series.

Reepicheep I love his quickness to forgive Eustace, the courage he shows on every occasion, and the loyalty he inspires in others. Perhaps my 4 year old nephew sums it up best: 'Reepicheep is a great friend.' And one I would love to have.

Trumpkin Despite not believing in Aslan or the ancient kings and queens he volunteered for a dangerous journey that had the end goal of meeting the one or the others and in the end met them all. Also, he makes me laugh.

Hwin Her gentle nature has long ensured her a place as one of my favorite Narnians.

Jewel His unwavering belief in Aslan, despite never having seen him, the kindness he showed Puzzle, and his loyalty to Tirian. Who doesn't love a courteous unicorn?

Aslan - how could I not?

Puddleglum - I am a recovering pessimist, and I'm practical to a fault, so I can relate. He also provides some welcome comic relief to one of the darker books in the series.

Lucy - her childlike faith is something that we can all learn from, no matter how old we are.

Ramandu - C.S. Lewis's description of what a star is (as opposed to what a star is made up) is fascinating. I like the air of mystery that remains despite him being so straightforward in explaining his story.

Coriakin - Along similar lines, there's such an air of mystery here. The big question - what did he do? (I don't think it's quite akin to the Christian concept of fallen angels, since him and Aslan still seem to be on good terms.) And how did he know Lucy was coming to undo what he would do?

Polly - She's the more mature of the two kids. Despite her being a little cautious, she's still fearless (she ran out to the fight at the lamppost despite the risk of being permanently banned from seeing Digory, and asked to go with Fledge and Digory). And I think it's cool how easily she ended up forgiving Digory.

Doctor Cornelius - He risks his life to help Caspian, and his goals are modest - he wants good treatment for dwarves/half-dwarves. He doesn't ask for political power, but he gets it in the end - shame we don't find out what happens to him after.

Edmund - He turns into being probably the wisest kid of all of them. I really like his maturity in talking to Eustace on the beach after he becomes de-dragonized, and his gentleness with Shasta after he stopped eavesdropping.

Lune - A gentle and humble ruler, and merciful, even to Rabadash. If only all leaders were like him.

Digory - Just as fascinating as an adult, but despite his mistakes, he proves to be very mature for his age in the Magician's Nephew.

Honorable mentions include Corin, Frank, Trumpkin, and the Hermit at the Marsh.