what's your favorite tv series of all time?

as Shameless started its final season last night, I'm curious what some of your favorite TV series are of all time...

my favorite series is probably Shameless. I only just started watching it 1-2 years ago after hearing my in-laws talking about it constantly, but I just couldn't stop watching it once I started! I'm sad to see it go but I do realize that a series running for 11 seasons is a LONG time....

other favorites:
the sopranos
the wire
weeds
sons of Anarchy
breaking bad
Ozarks

Just one? 

Foyle's War and the old The Twilight Zone are the first two that came to mind.

Well, just for sheer enjoyment, it would have to be Engineer Bill's Cartoon Express show with the Red Light, Green Light Game for drinking milk in 1954 and Sheriff John's Lunch Brigade 1955-56, singing along with the Birthday Party Polka ("Put Another Candle on My Birthday Cake"). I haven't had as good a time watching TV since.

https://en.wikipedia.org/wiki/Bill_Stulla
https://en.wikipedia.org/wiki/Sheriff_John

I just found out that weeds is having a sequel made by Starz called Weeds 4.20 that takes place 10 years after the original series finished with some of the original cast, I believe. if you liked breaking bad, you'd like weeds!

Too many to name, and I know the more recent ones are quite good as well, but I grew up in the 70s and 80s, and some of the rawness and honesty of some of those shows were extremely stark without seeming to glorify violence and negativity and a good example of this, and probably my favourite:

Hill Street Blues

These posts bring two shows to mind - one as wholesome as they come, the other absurdly violent, but both "places" I remember fondly.  We watched Family Matters - starring the Steve Urkel character as the quintessential nerd - with our young children.  At the other end of the scale are the Roadrunner cartoons, which were regular move shorts since before I can remember, and which were also broadcast on network TV starting in 1966.  Truth be told, I never tired of seeing Wile E. Coyote fall off a cliff or have one thing or another dropped on his head.

Drama

1. Star Trek: The Next Generation
   
2. Lost
   
3. The X Files
   
4. Twin Peaks
   
5. The West Wing
   
6. Game of Thrones
   
7. Firefly
   

Comedy

1. Monty Python's Flying Circus
   
2. The Bugs Bunny Show
   
3. The Kids in the Hall
   
4. Barney Miller
   
5. WKRP in Cincinnati
   
6. Dharma and Greg
   
7. Azumanga Daioh
   

In no particular order, the original Twilight Zone, I Love Lucy, Mash, the Danish comedy series Rita, many British series including Are You Being Served, Rising Damp, To the Manor Born, Sherlock (with Benedict Cumberbatch) and Sherlock Holmes (with the late Jeremy Brett), and so many others.  To pick an absolute favorite would be difficult, if not impossible.

... Sherlock (with Benedict Cumberbatch) and Sherlock Holmes (with the late Jeremy Brett), and so many others.  ...

Jeremy Brett was THE Sherlock for me (as a fan of the original texts), but I do like the clever modern adaptations in Benedict Cumberbatch's version.

... At the other end of the scale are the Roadrunner cartoons, which were regular move shorts since before I can remember, and which were also broadcast on network TV starting in 1966.  Truth be told, I never tired of seeing Wile E. Coyote fall off a cliff or have one thing or another dropped on his head.

I know what you mean. Even when you know exactly what's coming next, it (along with the Bugs Bunny shows) never gets old. 
That's what makes them classics.

Earthquake Pills*

fine print: *Not effective on roadrunners"

I'm laughing at this right now, recalling what happened before and after.