I don't have a lot of time to dedicate to watching TV series so I try to be more selective as far as production quality. I've enjoyed The Sopranos, Breaking Bad, Mad Men, Game of Thrones, House of Cards (Seasons 1-4), Boardwalk Empire, Downton Abbey, The Crown, and Band of Brothers among others. CBS's Survivor has been my one network junk addiction, but my excuse is that I watch it as part of a group.
I'm currently digging The Marvelous Mrs. Maisel. Great writing, acting, and a wonderful retro 50's NYC setting. Won 8 Emmys after its first season.