The only prerequisite is that you've watched them. You're not judging on popular opinion, you're judging on your experience having watched the whole series. Also,
You can list in random order, or specifically 5, 4, 3, 2, 1.
Make any small note you wish, or not.
Can't be in production currently. Meaning, the show is over. It could be in repeats or on DVD, but it doesn't have new episodes being currently produced. (Reboot shows are fine, like the upcoming Dynasty, Roseanne, Will & Grace, etc.)
You can include network or streaming shows that have ended.

Talk shows not included (Oprah, Donahue, etc).

For me:

Breaking Bad (you root more as the main character gets worse as a human)

Friends (the only shortcoming was Joey being interested in Rachel)

Will & Grace (groundbreaking in many ways)

Three's Company (John Ritter at his best in physical comedy; I loved him)

Roseanne (too many highlights to mention here)

Honorable mention: Melrose Place (for the sheer campiness of it)

OZ

Homicide: Life on the Street

Law and Order (and all related spin offs, but particular emphasis on the original)

NewsRadio

Bosom Buddies

Special Mentions:

The Facts of Life

Hill Street Blues

Degrassi (all incarnations)

Men of a Certain Age

[Edited 5/22/17 22:53pm]

MissEmeraldCity said:

OZ

Dang it, I forgot about that one.

Recency bias is in play and these are my faves, not what I'd put in the best top 5 of all time

The Simpsons

Roseanne

Shameless (US)

The Americans

Orange Is The New Black

Hudson said:

Recency bias is in play and these are my faves, not what I'd put in the best top 5 of all time

The Simpsons

Roseanne

Shameless (US)

The Americans

Orange Is The New Black

Okay good shows, but you posted current shows. The rule was to post shows that have permanently ended. (I do love Shameless, tho.)

Here is my All-Time Top 5 List

1. White Collar (for Matt Bomer )

2. A Different World (Great cast, topical storylines (AIDS episode in 91) and musical guests eg. Heavy D and The Boyz.

3. Moonlighting (Bruce & Cybill had great chemistry.....but the show jumped the major shark when they got together)

4. Dynasty (The cast, over the top story lines...eg. Moldovia masacre cliffhanger episode in 1986, the fashions and fights between Crystal and Alexis )

5. Dr Quinn Medicine Woman (you can play the drinking game when Dr Quinn had to perform a life saving brain operation on nearly everyone in the town. Or when the local bar owner Hank would say "We don't like......." in nearly every episode

TrivialPursuit said:

Hudson said:

Recency bias is in play and these are my faves, not what I'd put in the best top 5 of all time

The Simpsons

Roseanne

Shameless (US)

The Americans

Orange Is The New Black

Okay good shows, but you posted current shows. The rule was to post shows that have permanently ended. (I do love Shameless, tho.)

That's a pretty major rule and it should have been in the thread title honestly. I didn't bother to read the lengthy first post when I saw a bunch of lists already posted. These are my all time faves and it doesn't matter if The Simpsons won't die, the Roseanne reboot sucks, Shameless and The Americans hit the skids during their final season, and OITNB bones the fish. They've earned their spot in my list already.

But If I may only pick shows that have forever ended:

Murphy Brown

Bewitched

Lost

House

Pioneers of Television

EmmaMcG said:

3. Deadwood Again, like the previous two, Deadwood is a show which is pitched to perfection. The only reason it's down at number 3 is because it only had 3 seasons and ended quite abruptly but for those three seasons, it was fantastic.

If only HBO was run then like it is today, a show that highly acclaimed wouldn't be canned without a proper conclusion (see the modestly rated 'The Leftovers').

Hudson said:

m*a*s*h

the wire

nypd blue

the sopranos

louie

honorable mentions to 'miami vice' (seasons 1 and 2) and 'horace and pete' (which was only a web series).

[Edited 5/23/17 6:35am]

Married...with Children
Seinfeld
Magnum, P. I.
The X Files
The Night Stalker

Edit: Didn't notice they had to be off the air, so had to remove a couple from the original post.
.

[Edited 5/23/17 12:46pm]

The Walkind Dead, Downton Abbey, El Señor de Los Cielos, Desperate Housewives and House of Cards.

TrivialPursuit said:

MissEmeraldCity said:

OZ

Dang it, I forgot about that one.

I'm telling you, no matter how times I see it, I always discover little things I've missed in the past; same with Homicide. Also, theshow, in my opinion, has some of the most wonderfully complex characters in television history.

Side note: Tom Fontana was the Executive Producer of both OZ and Homicide. David Simon, who started off as a writer (and later producer) on Homicide, went on to create The Wire, The Corner and Treme.

ST (all series)

StarGate
Six Feet Under
Twilight Zone
Treme

[Edited 5/23/17 21:45pm]

MissEmeraldCity said:

OZ

Homicide: Life on the Street

Law and Order (and all related spin offs, but particular emphasis on the original)

NewsRadio

Bosom Buddies

Special Mentions:

The Facts of Life

Hill Street Blues

Degrassi (all incarnations)

Men of a Certain Age

[Edited 5/22/17 22:53pm]

Bosom Buddies!! Yes!!!

Breaking Bad, Little House on the Prairie, Arrested Development, Baskets, The Office (UK)

1. The Professionals

2 The Sweeney

3. Only Fools and Horses

4 One Foot in The Grave

5. Hawaii Five- 0 ( Jack Lord)

Forgive me for picking only one from the US am from the UK.

Special mentions

Auf Wiedersehen, Pet

The Equalizer (Edward Woodward)

[Edited 5/24/17 13:17pm]

These are shows that have ended their runs which I would happily rewatch at any time:

1. Mad Men - best show ever
2. Buffy The Vampire Slayer

3. Downton Abbey

4. Firefly

5. Angel