8. His Stories Allow For Character Arcs Completely Separate from His Crime-Fighting
This has already been touched upon quite a bit, but because of who Matt Murdock is, and because he's more important than the character of Daredevil, he has story arcs that can take him practically anywhere. See, Daredevil is the symbol that sells the comics, but the people stay for Matt Murdock. There can be issues where Daredevil doesn't even have to show up and readers are so perfectly fine with it because of how invested they are in the drama that is Matt Murdock's life.
Daredevil: Redemption that I mentioned a few times earlier? Daredevil probably shows up a handful of times. It's not a Daredevil story. It's very much a Matt Murdock story. When Murdock is imprisoned in the Ed Brubaker run? Matt Murdock story. Frank Miller's first start with
The Man Without Fear? Daredevil doesn't even show up in costume until the
last page. Would you read a run of comics just about Bruce Wayne or Clark Kent? You might, but what's the probability they'd be this investing?