Favorite TV series

Doctor Who
Justified
Sense8
Wentworth
Bates Motel
Outrageous Fortune
Sons of Anarchy
The Office (UK)
Big Little Lies
Flight of the Conchords
American Horror Story
Star Trek Voyager
Louis Theroux

BlackAdder
Allo Allo
One Tree Hill (I don't know why but I watched it for the first time years after it was axed and got hooked. It is bad but unashamedly so).
Life on Mars (UK Version)

Magnum, P.I. (1980-1988) is my all-time favorite TV show.

Some other favorites in no particular order:

The Dukes of Hazzard
Columbo
Seinfeld
Star Trek
Sledge Hammer!
Family Ties
Bewitched
Newhart
Cheers

I can't think of any others that I liked well enough to watch more than once. Most modern TV shows are serialized, which means every episode is tantamount to a "to be continued..." episode from a normal TV show. I've found a few of them interesting enough to watch one time through just to see where it ends up (such as The X-Files and Stargate SG-1, though neither of them were as heavily serialized as most current TV shows), I'm not even remotely interested in revisiting such a long haul, starting way back in the beginning, sitting through "filler" episodes that you already know don't advance the overall or season arc in any meaningful way. I've never watched an episode more than once from a heavily serialized TV show, let alone the whole series more than once.