TOS has a phenomenal season 1, but then it gets cheesy in season 2 and 3. The TOS movies are mostly great.
Enterprise is underrated.
TNG is overrated, despite still being a great series with some great movies.
DS9 and Voyager are both incredibly underrated simply because they came after TNG. Both DS9 and Voyager have a drastic change about halfway through: DS9 starts off as a gritty political drama where the station works to be a peacemaker between factions that have negative history, and are plotting against each other. The second half is more a story about a war without much war in it, and Sisko is like a messiah-type character who is an unstoppable mega-leader, more of an excuse to get off the station as much as possible in the Defiant. Then arguably there's the third part, where Sisko fails, and it's about him wandering around while the war continues, then he comes back and kills it.
The first few seasons of voyager are more about the survival of the ship, and getting home and had many more main characters, but then during season 3 they began narrowing the focus of the cast, killing off multiple side characters, and then making it mostly Star Janeway and 7 of 9, and then they focused on much stronger episodic content and less focus on the arcs.
I think all eras of both shows have heir merits. On DS9 I tended to enjoy the earlier part more, but I can't deny I enjoyed the who,e thing. On Voyager I liked the concept of the first half more, and loved the overall story, but overall enjoyed the episodes of the second part a lot more.
In the end, I think the experimentation of long story arcs in DS9 and Voyager were interesting, but ultimately, going beyond 1-2 seasons gets tiresome. Even today's shows, with all the practice and knowledge we know, tend to get tired after a while. That's why TV shows are moving toward 1 season arcs that are linked.
I describe myself as a little dose of toxic masculinity.
