Shows that should have been renewed?

My list has Invasion and In Justice.

Brandy Alexandre...

Conviction was just getting good.

Robin Miller...

I watched all the episodes, but I was disappointed that Alexander Cabot
didn't make more of an impression. I liked the character on SVU, and she
was the reason I was looking forward to the show.

Rhino...

My most-missed cancelled shows:
1. Wanted
2. Thief - I've heard it's cancelled, correct me if I'm wrong!
3. Reunion

I don't actually care that much about Reunion but I would have liked to see
them resolve the central mystery.

David B...

Invasion
Threshold
Surface

Rob Jensen...

Add to that:

Everwood (top of my list, with Invasion #2, after that cliffhanger
finale)

Arrested Development

Conviction (I agree with another poster -- it was just starting to get
good).

Threshold

-- Rob

Robin Miller...

Yes, my own private stalker has been MIA for a while... Which is not to
say that I miss him.

Larry Smith...

I agree on In Justice.

Robin Miller...

I forgot about Threshold. When it was cancelled I thought it was the
best of the three new scifi shows on the major networks. Poor Carla
Gugino. First Karen Sisco, then this...

shawn...

And it was getting better. I haven't seen all of the episodes that
didn't air in the USA, but those that I have seen were much improved.

I'd add COMMANDER IN CHIEF. It was admittedly flawed but ABC did
nothing to help it survive. I would have liked to see it given one
more year.

kaydigi...

In Justice
Heist (should have been retooled for a summer showing on USA)
and Girlfriends should have been cancelled 2 seasons ago.

Robin Miller...

I almost put Heist on my list. I always enjoy Steve Harris. I hope they

Justin Pate...

The bassist from Iron Maiden is in a TV show? ;)

at least show the rest of the episodes.

Steven L....

Fear Factor

Surface

Invasion (but only if the producers agreed to retool the show to pick up
the pace)

30 Days (Spurlock's reality show on FX that was a cut above)