I would have to say Lost. It's basically the show that got me into watching TV shows in general, and just a world I deeply enjoy submerging myself into. I have rewatched it many times now (and actually completed another rewatch back in February).

Marvel's Agents of S.H.I.E.L.D. is a very close second, they have an absolutely wonderful cast and have managed to keep innovating and always interesting to me. It's a hard choice between that and Lost... but there's really nothing like Lost haha.

I'd have to say Grey's Anatomy. I first saw the show when I was supposed to be studying for my exams, so I had to moderate how much I could see of it. I ended up watching 7.5 seasons of it in three weeks (I did not pass all my exams that time. I maintain that was a total coincidence), but ever since then, I just kind of stuck with it. I'm just a big sucker for witty one-liners. Oh, and big love for Cristina Yang!

Lol, I thought this would be a joke wiki but it’s an actual wiki

Marvel's Agents of S.H.I.E.L.D., by far, with Agent Carter coming up second, but far behind. Also, United We Fall, Shark Tank, and others.