I am a fan (and you should be too), because...
***Edited months later to add:
I just have to say that I never wanted Chris to win AI. I wanted him to get into the top 5 and that was it. He just needed to be heard and the rest I knew he could do on his own. When he was voted off that night, with tears in my eyes, I was saying over and over to him "you're going to be fine, Chris! It's OK! It's OK!" I hated seeing his disappointment but I honestly knew he could do this and didn't need to win. And that's a fact.
I don't mean to come off "holier than thou" b/c I am far from that type of person...I just find myself getting annoyed when I read over and over and over how mad someone was that he lost. I know it just shows how many great fans he has and I think that part of it is awesome! 
I guess what I'm saying is that in addition to my first post below, I am a fan b/c his talent and tenacity radiate from him and he makes you believe in him...even when he might not believe in himself.
*****
Frankly, because Daughtry's music will change you.
At first I couldn't understand it, the effect Chris' voice had on me. I mean I was very impressed with his voice from his AI audition and it only got better after that. Through AI I realized what an amazing person he is, kind and honest. He's "good people" and although I don't know him, I'd bet my life on it. So this all added to my addiction to Daughtry's music, yet I really didn't get why it was having such an effect on me.
Then, it hit me. I have been listening to nothing but children singing children's songs for almost 4 years now. Music was always a way to disappear for me, to escape from the hectic world, whether it be to relax or get crazy dancing. I'd forgotten all of this. I'd forgotten to stop being a Mom 24/7 and remember I am a woman also. Chris' voice, Daughtry's music, took me to a place I love to be.
I haven't really taken any time for myself at all in many, many years. This is all by my choice. Yet, Daughtry, Chris really, pulled me up out of that. All of a sudden, I began to feel like "Amy" again and actually remember that I kind of liked hanging out with her. She's a cool chick!
It's so important to always have "me" time, no matter what our lives are like. I am now happily taking that time for myself and it's made me happier in so many ways. For me, time to myself has always included music-I remember a sunny Sunday afternoon many years ago resting my head on a step in our house listening to the Top 40 Countdown with Kasey Kasem. I will never forget those few hours of nothing but me and music. The number 1 song was "Every Breath You Take" for the 8th week in a row. I'll never forget that time-I'd say day but I don't recall anything but those few hours.
So, now it's me and my ipod, loaded with Daughtry, Nickelback, Shinedown and more plus any song I hear Chris recommend because for some weird reason, I happen to completely love every song he does. Not in a stalker way either! My dream is that he loads up my ipod someday, that'd be so awesome.
So, that's why I'm a fan. Because Chris and the guys have made me remember that I like myself and more importantly, that I've really missed *me*-Thanks, guys.
