I thought this was brilliant. Finished series last night and I think I'd class it as what I was expecting - given what I saw of him in Daredevil I was very pleased.
The point is there was a huge amount of violence (as you'd expect) but there were some great moments where you could see Castle hadn't been completely consumed by tragedy. It was good for them to bring Karen into the storyline as it made sense to do so more than anyone else.
I gave up on Agents a season or so ago; Iron Fist... I wanted to like it but just didn't do anything for me; Jessica Jones was just not for me; I haven't bothered with Defenders, Inhumans, Agent Carter and others just don't interest me.