Item 2; Matt is a Lawyer. And a good one. Pound for pound Matt Murdock is the best lawyer in the city, he’s strong, he’s smart, and he’s determined. It also makes him a hypocrite. He is sworn to uphold the law. His professional life is dedicated to serving and protecting the justice system as if it were a religion, a pure faith. Then at night, he puts on a mask and breaks the law, the very thing he serves. Nuts? Whoa yes. And that's without mentioning that he's a catholic who dresses like a devil to do the right thing...
Item 3; Matt is a liar. Totally. Completely. In a long running storyline of a few years back, Matt was ‘outed’ in the press. It was leaked that he was Daredevil. His response? He lied. He stood in front of the worlds press and stated that he wasn’t. He sued the newspaper for libel, and won. He sued anyone who made the accusation. He refused to resign from his job, and continued to serve both as a lawyer and a masked vigilante. His friends were not shy in calling him on his bullshit, his arrogance. But he kept going. He endured. Did that make him a hero? That’s a difficult issue. It certainly made him a great character.
Item 4; Matt is insane. He is. There is no doubt. In the seminal Born Again storyline he cracks. He is pushed right up the edge of his sanity by his archenemy and…well…his sanity doesn’t fare well. He starts to see conspiracy. He talks to himself. He sleeps rough. He breaks off all ties with the world around him. He’s had at least one other nervous breakdown since then. He is not a stable person, if you didn’t already get that from the ‘blind-man-rooftop’ thing.
Item 5; He fails. A lot. I don't think any superhero has had his or her ass handed to them as often as Ol' Hornhead.