To be fair, I felt like DD was finished and had a full and complete character and story ark. Likewise The Punisher; S1 was pure chaos as it should be, S2 had his internal struggle and ended with him finally embracing being the full-on costumed Punisher and (for me) that felt like a natural end point. Iron Fist also went full circle and would have felt complete IF they hadn't included the cliffhanger with the... erm... chi guns. Ending on Colleen inheriting the fist was fine.
Remains to be seen where JJ ends.
Luke Cage... I would have been interested to see an S3 and it has now essentially ended with him becoming a supervillain
