You were far too kind about Flashback - the most squandered, poorly executed use of a special guest star and radical budget (Excelsior bridge, etc) in Star Trek.... ever! The premise is just waaaaay to much of a stretch. There's no way in my wildest imagination could I buy it for a second. It all happens inside Tuvok's head... just utter garbage. And that fucking stupid ending with all the kids falling off the cliff.... gawd.
Other than that, I kind of enjoy the weirdness that is VOY season 3. Before and After, Worst Case Scenario, Future's End and Real Life stand out for me as some of Voyager's best (most entertaining).