As I said last time this subject came up on this board:
I don't buy into the "Star Trek is only for showing a perfect, positive future" philosophy that many Trek fans do. In fact it wasn't until I started reading Trek forums that I even
realized such a philosophy existed. Because it certainly wasn't evident from me watching the TOS show for all the years of my life. TOS has conflict between the characters and aliens of the week, and internal conflict amongst it's crew. DS9 had the exact same thing, which makes them two peas in a pod.
There was a Poll on the General Trek board of this site a year or two ago, which asked the question something like "Which other Trek shows best carries on the spirit of TOS?" and DS9 won that Poll by a landslide. For very good reasons in my view.
I would argue that in addition to making the shows TOS and DS9 shows spiritually akin to each other, it also made them be the only entertaining Trek shows. By taking all the conflict out of TNG and VOY, in my view that made them extremely dull and boring & that boringness is unbecoming of what Trek should be. That boringness pervades the other Trek shows constantly, something TOS and DS9 rarely suffer from.
I'd say that if any other show is not Star Trek, then by TNG and VOY abandoning those things (conflict, adversity etc.), it is TNG and VOY that are not Star Trek. I haven't seen enough of ENT to comment knowledgeably about if it abandoned those things too.
So yes, DS9 is definitely Star Trek. DS9 is basically just a much more fleshed-out, sophisticated, and deeper verison of TOS.
