Once Upon a Time
The Good Wife
Criminal Minds
The Big Bang Theory
NCIS
CSI
Scandal
Entourage
Bones
Arrow
A lot of shows get the chop because of time constraints.
I find it harder to watch sitcoms these days, but I think that is because there are too many good hour long shows.
There are shows like The Walking Dead that are hard to watch week by week but this is more out of impatience, than it being a bad show.
American Horror Story had a strong season 1, season 2 etc have not been as good, but because each season is completely different and a lot of the actors are good, I will still watch each hoping it will be great.
Vinyl I have four episodes ready to watch but again time constraints.
Frankenstein Chronicles I love Sean Bean but two episodes was enough