I simply found Red's character, with his random tangent musings, funny. His (black)list gives you a weekly story, as any old cop show would, and they can be alright, despite often being far-fetched. Liz is easy on the eye (every little helps). If you find it entertaining then just keep going...
Oh yeah, I did a few seasons, but then it became a farce where people who had made alliances suddenly dropped them because they needed allies to be foes and vice versa - it was pathetic.
I managed more seasons of the US copy of House of Cards than I should have. 1 season was good.
Every episode of the Blacklist was the same, but I generally didn't mind because it was just some easy fun. I managed 8 seasons, but (no spoilers) it's since changed.
I gave up The Walking Dead