Two of a Kind- A show the olsen twins were in from 1998-1999 but the two adult characters stole the show. The dad was an uptight science professor and he hires one of his students to be the kids babysitters and shes the exact opposite outgoing free spirited. I think a lot of people dismissed it because the twins aren't good actors and thinking it was just a kids show, but there were a lot of adult jokes and it was a lot funnier than some sitcoms on now. Ends on a cliffhanger, cancelled after only 22 episodes. check it out on youtube.
Ugly Betty- 4 seasons, 1 of those shortened doesn't seem long enough.
the OC. ditto as above however the finale was great one of the best endings to a show i've seen. Gossip Girl is a pale replacement.
Joan of Arcadia- Ends on such a cliffhanger too. I've heard the reason for cancellation was because not the right age group of people were watching the adverts or something.
Beyond Belief: Fact or Fiction- Really great show and premise. You were shown 5 stories and had to guess which were false and which were based on true stories. Some were actually pretty scary but rewatching them now they don't seem to be. Ran for 4 seasons but only 45 episodes on a channel called cbs reality in UK. Check it out on youtube
Mostly true stories: Urban Legends: Similar to BBFoF but these stories were urban legends and afterwards you were given an explanation into how it originated and they were researched to check their credibility. The acting was pretty bad in this one though and the stories were often more on the funny side and less scary. used to be shown on a channel called men & motors
8 Simple Rules- Ran for 3 seasons. This one isnt really anyone's fault as the principal actor John Ritter died. They went on without him for another couple seasons but just wasn't the same.
Gilmore Girls- My favourite show of all time. I've been a fan since 2005 and watched it go through it's many channels in the Uk; Nickeloden, Hallmark Channel, e4 and now 5*. I got the Australian release of the dvds due to the lack of uk release. Anyway the original series creators left at the end of s6 leaving a train wreck. New writers for season 7 meant a lackluster final season. There is talk of a movie but I doubt it will ever happen as i think most of the cast would only do it if the old writers came back and the original series creators haven't even watched s7 and would have to pick up from where it left off.
Project Runway- this is not cancelled but sky stopped showing it in the Uk a few years back and every week it takes me a while to find a link. plus ive never met any other uk fans
Then there are shows that I was a fan of but because the last season or so was not as good quality I wouldn't have wanted another season unless it was like the earlier seasons
Friends
Scrubs
Desperate Housewives
Will & grace
malcolm in the middle (on the fence about this one as I haven't seen the last season for a while)
this was extremely long so I doubt anyone will read it all but it was fun to type out anyway