Agents of SHIELD - watched the first couple of seasons but lost interest. It's not a bad show, but it's a wee bit too clean-cut for me. Will watch the most recent season because of Ghost Rider (although it's not the Johnny Blaze incarnation).
The Flash - loved the pilot episode and meant to follow up, but I kinda blinked and now it's a few seasons into its run. I've got too many unread books lying around to play catch-up, but I really like how it embraces its comic-book roots.
Arrow - I'm such an 80s comic-book nerd at heart that I flatly refuse to watch a single episode of this because WB wants to make it so "grim-and-gritty" they shortened the name. It's GREEN ARROW, gosh darnit. Also, unless your name is Luke Cage: superheroes don't wear hoodies. Get out of here with that Smallville crap.
Gotham - Batman without Batman, with a weird timeline that will eventually feature Bruce Wayne becoming Batman in time to casually stroll down to Gotham Social Welfare and beat the crap out of his rogue's gallery while they are waiting to collect their pension cheques. Stupidest. Premise. EVER. Refuse to watch.
The Marvel Netflix shows - these I make time for. Daredevil is my addiction. Jessica Jones was good but told a story over 13 hours when it really only needed about 6. Same with Luke Cage, although it was a nice love letter to Harlem. The Iron Fist showrunner Scott Buck pulled a Dark Tower: took everything that was special about the mythology and threw it away. Buck is busy ruining Inhumans now and he's been replaced for IF season 2. Hopefully it will improve. Scott Buck and Akiva Goldsman should be relegated to daytime soap operas. The Defenders was good, although not as good as it should have been. There's a Punisher series coming up with Jon Bernthal. He was magic in Daredevil S2 and I'm looking forward to this. He's my favourite comic-book character after Spidey.
I don't watch any of the others, so I can't comment on those.
i forgot about all the netflix shows. i'm down with all things marvel and netflix