I'm a fan (and you should be too) because...David is an awesome, versatile artist, who changes beats, melodies, arrangements and makes songs that I would have never even thought about listening to or buying, something I 'd listen to over and over again! To be honest I really didnt give much thought to David when I first saw him audition on idol. Yeah, he had a good voice and all but to me that was it. I think the turning point for me was Billie Jean. When they announced that he was gonna sing that song, I was like "oh,oh, cause I was picturing him doing the MJ version(fast beat,white socks and all)lol. I never heard the Chris Cornell version. After he performed that song, that was it for me. I tuned in every week just to see him and to see what new thing he was gonna do and he never disappointed me! I loved the way all his sets made you feel like you were at a David Cook concert. He connected well with the audience and with the cameras. When the cameras were on him and he was singing, he always made you feel like he was singing to you personally. I could go on for days about why I am a fan of David's. He is a cool human being, really down to earth, loves his fans,(all these sites that he has up are a testament to that !) and last but most certainly not least, he is GORGEOUS! 
congratulations!
Awesome!! I know # 4 is not far behind!!!
--