It's been a while since I did one of these. OK, here's they are ranked in order of preference:
Jessica Jones (by far the best)
Daredevil
Supergirl (it's a nice easy counterbalance to the darker Netflix shows)
The Flash (again, a light, bright counterpart to the darker stuff)
Arrow (had its ups and downs, but it's on the up again now)
Gotham (gets better and better; has its problems, but I enjoy the craziness of it)
Agent Carter (I like the cast, but I find the plot a little plodding)
Agents of SHIELD (a year ago it would have been at the bottom of the list, so it's improving!)
Legends of Tomorrow (just awful!)
Lucifer (police procedural, but he's the devil? Just the idea of it makes me fall asleep)
I didn't include Constantine, as it got cancelled last year, but it would fall just above LoT in that list.
Jessica Jones (by far the best)
Daredevil
Supergirl (it's a nice easy counterbalance to the darker Netflix shows)
The Flash (again, a light, bright counterpart to the darker stuff)
Arrow (had its ups and downs, but it's on the up again now)
Gotham (gets better and better; has its problems, but I enjoy the craziness of it)
Agent Carter (I like the cast, but I find the plot a little plodding)
Agents of SHIELD (a year ago it would have been at the bottom of the list, so it's improving!)
Legends of Tomorrow (just awful!)
Lucifer (police procedural, but he's the devil? Just the idea of it makes me fall asleep)
I didn't include Constantine, as it got cancelled last year, but it would fall just above LoT in that list.