It not just Fox, but they have probably the worst record for canceling good shows.
The converse of this statement is that Fox has an good record for greenlighting good shows. I can't think of any programs from the American CW or CBS offhand that I'd be interested in watching.
TV in general has gone extremely down hill
Some TV series that are currently running that I watch when I can:
, Breaking Bad
, Game of Thrones
, Boardwalk Empire
There's an argument that the since the last decade we've entered a golden age of television (with since concluded shows like the Sopranos
and the Wire
being chief among these). I thnk it's a pretty tenable argument.