I'm a fan (and you should be too) because...

... I love her music

... I love her style

... I like what she has to say, what she has to tell

... her lyrics aren't senseless and do tell things

... it is very interesting to see how she changes

... there are songs which can make you cry

... there are songs which can make you smile

... there are songs for most of every emotion which a human can feel (at least for me it feels like that)

... you can listen to her songs as long as you want you won't get tired of them

... she is still a "human beeing". wondering what I mean? she does not act like many celebrities do - like they were something better... and she takes time for her EwFs......

... I have some things in common with her

... she helped me through a very hard time (no joke, I'm sure I wouldn't be alive anymore without her *healing music* and various interviews..)

... her voice is absolutly stunning

and there is so much more... but I can't think of more right now..
will add some stuff later...