Dead like Me - both comedy and serious, starring Mandy Patinkin... i think its fairly highly rated on IMDB too and its really worthy to watch - i think it has more than entertainment value.

The Event, Surface, Flash Forward, Invasion, Odyssey 5, Threshold - all 6 sci-fi, all 6 great IMHO and all 6 canned after the first season. That can be a positive too, at least they stopped at their best and you dont have to watch following seasons most likely full of mediocrity and recycled ideas  

Frogboy!

Read homestuck!

http://www.mspaintadventures.com/?s=6

that prolly looks really boring!

So heres a slighly shitty trailer video (that i made) that makes it look not so boring!

http://www.youtube.com/watch?v=-TsEpDS7-Mw

not quite a TV series, but. awesomes.

Here is what Dante Basco (TV and movie actor, writer, producer), has to say about it:

"I truly find this whole “Homestuck” amazing… It’s something I’ve never seen before. It’s like a book or a comic, only it’s not a book or a comic… it’s something new. It’s like an entirely new way of telling a story. I’m reading this story on the internet, learning what’s going on through pictures of these characters and their “IM” conversations… There is no other time in history that a story like this could be told and in this way, except for now… That’s kind of amazing."

I'd recommend Fringe. John Noble is brilliant.

Also Heroes. Season 1 was one of the best sci-fi/fantasy tv series I've ever seen. Don't watch other seasons, it's a waste of time (at least was for me).

I would recommend the latest adaption of Sherlock Holmes. Its a Miniserie with 3x90min episodes per season. Absolutly brilliant. Cumberbatch (Holmes) and Freeman (Watson) are fantastic.

M*A*S*H

All Creatures Great and Small

Agreed, GREAT series. It's Holmes in all the good ways, and modern in all the good ways.

Thats true. First i was very sceptical. I´m a big Holmes-Fan since my teenage years, when i read the books. It was like "Holmes with iphone and internet? wtf! That can´t be good" But it works perfect. And Cumberbatch is one of the best Holmes i´ve ever seen.

Its great, but i felt the second season went bit over the top.  

Fringe

Dexter

The Walking Dead

Shameless

Califorication

Game of Thrones

Alcatraz

Boardwalk Empire

Game of Thrones

and I highly recommend Spartacus.

all avail. on-demand.

Holmes & Yo-Yo

The Walking Dead

Game of Thrones

yeah farscape wasn't to shabby,you don't mention the peace keeper wars that part was made two years later to end the story as season 4 was ended incomplete.

Back on topic:

SG1

Stargate Atlantis

Earth Final Conflict

Mash

It Ain't Half hot Mum

Allo Allo

Does The Two Ronnies count,very funny

Black Adder

Open All Hours

Who can forget the A-Team or the Original Mission Impossible

I like Two and a Half Men before Charlie Sheen left.   And The Office before Steve Carrell left.

Extras, Curb Your Enthusiasm, EastBound And Down.

Peep Show, That Mitchell and Webb Look

and I second Black Adder