I really ship Karen X Matt, screw you Claire.
What really caught my eye in the first season though, was Matt's struggles with his identity. Would he kill someone and become the devil he fears becoming? Or would he just knock everyone out and avoid killing anyone and just keep being the good guy? You know, there's something stupid about daredevil not killing anyone, not even those who are dead set on killing him. Here are some bad results of this: A) No one will really fear him, because they know he would never kill them! B) Just knocking everyone out won't stop them, and it's only in the "perfect" world that the cops will be there to arrest everyone he knocks out. If the cops don't arrive, they're just gonna heal and get back to doing whatever bad things they used to do. C) By not killing a bad guy (like Kingpin), daredevil is in another sense allowing him to stay active and kill other people. So in a sense he's actually killing a lot of innocent people!
Though he has killed someone already (Nobu), idk if that counted because it didn't seem like a big deal in the show at all.
Edit: Yeah, so I really want to see this struggle addressed in season 2...