Cedric wrote:i also think that he may still be alive because he was jkr's favorite character. who knows i could be wrong...its far-fetched.
I dont recall JKR saying that Sirius was her favorite character. The one I've heard most frequently named as her favorite is Lupin, but have only seen in print where she says she "loves Lupin, Dumbledore..." and also the others, Ron, Harry, Hermione, etc. That's somewhere on her website.
Sirius was a character that left me a little detached. He was tragedy because his life was cut short before he had much of a chance to live it. I wasn't quite as attached to him though as I am some of the others. (like Lupin...now that's a doomed hero if I ever saw one.)