Although it does annoy me when every pilot season rolls around and the majority of them are obvious knock offs of successful shows in the hopes that lightning will strike twice.
Hollywood chasing the success of a hit can lead to very enjoyable shows, though, including shows within genres that most of us here favor. For example, I'm sure the success of Star Trek: The Next Generation
helped get Babylon 5
on the air.
As for network pilot season each year, there are often trends where the networks develop a lot of shows within one or two genres, but they're not always trends chasing a recent hit. This pilot season saw a lot of spy shows, lawyer shows, and Friends
-style sitcoms about groups of young singles, even though the last few seasons haven't had a big hit show in any of those genres.