Crazy was Willie's...?

The song Crazy was Willie's favorite because it _________________.
What did Willie say about this song??

"was a lot of magic". He stated it in a Patsy Cline documentary in 1993.

I think he wrote it for Patsy Cline, it turned into a BIG hit for her, but don't know what he said about the song....

I recall him saying there was something about the way Patsy Cline sang it that made it one of his favorites but my brain won't pull it up right now.