Have have been really sick for a month now so I have spent most of my time watching old TV shows. About half way into DS9 I started to think which was the most popular.
I have to go with TNG. DS9 almost wins but I really hate the prophets/ Emissary crap. It just does not seem to fit with the rest of the show. Plus in later seasons when the war is in full swing the religion sub plot is just in the way. There is an intersteller war happening but who wants to see that when we can have a whole episode about religion!
Plus TNG has Data. I love Data.