I'm a fan (and you should be too) because... Actually I'm not a fan (when you worry about your sanity on whether your Bi or Lesbian because you love Adam Lambert) JUST kidding I actually am a fan of Glambert, I just have a sick sense of humor lol
The reason I am a fan is he has the greatest voice, and an amazing talent for getting original music and making it modern and his own.
So his music, talent, humor, and everything else about him, how he is himself and not letting others change him.
He is the Modern day Freddy Mercury.
And that is why I am a fan 
P.S. Plus I think when you have dreams of what his music videos would look like, sorta moves your sanity a little off heh.
that look... gosh... same one he does sorta in FYE it is amazing <3