I enjoyed it, but wasn't blown away, and I guess I was expecting a lot, because I felt a little disappointed. I did also like Danny more than in Iron Fist. A review I read put pit perfectly - in IF, Danny Rand was whiny and annoying but the show didn't seem to know it, but in Defenders, that clearly was part of the point of his character, and his arc. I particularly loved when Danny shouted for them not to treat him like a kid, and Murdoch said, "Then don't act like one." Classic, and so true in that moment.
I really felt they had no idea what to do with Jessica however. A lot of the feats of strength they gave to Luke she could easily have handled. Also, Iron Fist = so whiney.
Am I the only one that thinks Kilgrave has really been the only worthy villain? The Hand, for immortals, were incredibly inept. Wilson Fisk was a big baby. And Luke's storyline cycled through so many villains I could barely keep them straight.
I definitely agree about Jessica. I've heard a lot of people say that although the plot was weak, the character stuff was great, but I'm not sure I entirely agree. I think some of the character stuff could have been better, especially Jessica and her input. I also thought she could've done some of the stuff they gave to Luke, and in dialogue scenes with the whole group, she never contributed much besides saying things like, "What?" Which isn't exactly out of character, but she's capable of more, and it got boring after a while.
I do think Kilgrave was a great villain, but I enjoyed Fisk as well (though not as much as some people), and I really, really liked Cottonmouth - wish they would've kept him around longer.