Daredevil was incredible. Have you only seen the first series? Sadly, the Netflix series' lose their way a bit after that. I won't say too much, but:
Jessica Jones S1 is incredible too, Kilgrave is a top notch villain. Haven't watched series 2 yet.
Daredevil Series 2 is great, but not quite as good as the first.
Luke Cage is a mixed bag, starts strong, ends weaker, but still enjoyable. Haven't watched series 2 yet either.
Iron Fist was garbage, barely made it to episode 3.
The Punisher is... something. I can't get too much into it without spoilers.
Defenders was so-so, sadly.