Careful about citing majority opinion as an argument for quality. Unless you are also prepared to defend the most popular music, the most popular movies, and the most popular of everything.
TOS and TNG have an advantage over the other three series because much more people are intimately familiar with them. Also TOS is a very top heavy cast, focusing more on the big three than the rest of the cast, and most of the polls so far have focused on the big three positions or positions where the TNG entry isn't one of the strongest.
75% of the time, more popularity is more related to better marketing than better quality.
TOS and TNG have an advantage over the other three series because much more people are intimately familiar with them. Also TOS is a very top heavy cast, focusing more on the big three than the rest of the cast, and most of the polls so far have focused on the big three positions or positions where the TNG entry isn't one of the strongest.
75% of the time, more popularity is more related to better marketing than better quality.