How many TV shows are there in the world?
There are hundreds of TV shows that exist currently & thousands that have existed worldwide. So many that it is inconceivable anyone would have the time nor patience to research all of them and type a comprehensive list. You best bet is to simply search Television Series by Country on Wikipedia and peruse them at your leisure.
I am one of the fans of Reality TV Shows and I like to watch Reality TV Shows only because by watching these tv shows, we get to see special and unusual activity given by the participants of reality TV Shows. Reality TV shows us how to increase our own confidence by showing off their own talents. So, basically different people like different genres of TV programs, which includes Reality TV.