Most shows are formulaic. If new ideas were required for each episode of a series then 99 percent of all series would be cancelled after 6 episodes. Its just more tolerable when it is a formula that has personal appeal than not having one. Look at all the guys who hoot at the hottie that is in each episode of Married with Children.
There are stupid British TV shows that are definitely formulaic, they cover the same basic plots and catchphrases over and over again, and are REALLY FUCKING ANNOYING!!
Two examples I can cite that are popular with Americans:
'Allo! 'Allo!
"You stupid woman!"
"Listen very carefully, I shall say this only once!"
"Good moaning!"
and
Keeping Up Appearances
"The Bucket Residence, the Lady of the House Speaking!"
"Richard!"
And all those stupid double-takes and reactions she does
Quincy, by comparison, follows a pattern, but it is always so compelling and entertaining.
The good shows always make you forget about the frequent repetition. I can forgive it with Keeping Up Appearances as I enjoy Hyacinth getting her nose rubbed in her shortcomings week after week. I've always wished there was an American version of it as we have plenty of self-important people here that need to be taken down a peg or two. But yes KUA does go to an extreme in terms of formula.