Absolutely agree with this except for Voyager. I can't exactly explain why—although I think it has to do with the care that VOY put into production design and set dressing, including the general look of the ship—but it does not look dated to me at all, whereas TNG and especially DS9 do.
Actually don’t agree with this at all. Compared to TNG, yes. But to me, Voyager has always looked particularly cheap and bargain basement compared to DS9 and its lavish, gigantic sets and superb production values. I know they basically had to inherit what they got from TNG and make the best of it, but it’s not an especially appealing show to me aesthetically. Too grey, too dull, very uninspired designs. I also never found the special effects nearly as good as DS9’s best, which is strange because I assume they were done by the same people.