Doctor Fate starts out as a genuinely mysterious character. There's no hint that he's even human. He uses arcane magical powers to fight off dark forces of evil.
Then midway into it, he becomes human and fights ordinary crooks. He stops using magic, and worse of all, he becomes a real medical doctor.
It's an incredible example of taking an intriguing character and running him into the ground.
Read it only for the early tales. Then put it aside before all your fond memories get ruined. ( )