Visible crew/equipment: When everyone returns to DS9, Worf and Jadzia reunite and kiss. Then, in the next shot, just as O'Brien calls out to Quark, there's a visible T-mark on the floor. (00:42:15)
Revealing mistake: In the shot following the Galaxy-class "tag team" on a Cardassian ship, a Miranda-class ship can be seen swooping right to left and then suddenly freezes due to a rendering error.
Resurrection - S6-E8
Visible crew/equipment: When Bareil enters his quarters and finds Intendant Kira dressed like Major Kira, just as Intendant Kira walks towards Bareil, in the mirror we can see the reflection of a crew member wearing a white shirt and shorts. (00:36:55)
In the Pale Moonlight - S6-E19
Visible crew/equipment: After Jadzia plays devil's advocate with Sisko, he tells her she would've made a decent Romulan. Then, when Sisko passes the camera as he walks around his desk, the blue T-mark is visible on the floor behind Jadzia. (00:06:10)
In the Pale Moonlight - S6-E19
Revealing mistake: As Sisko is threatening Tolar in the simulator, Tolar's prosthetic mask can be seen to bend awkwardly against the wall, as if made of rubber.
Visible crew/equipment: At the start, during the briefing in the wardroom, everyone walks over to the table. And just as Sisko finishes saying, "The Seventh Fleet will be engaging the enemy in the morning," a white tape mark becomes visible on the floor at the actor's feet. (00:00:20)
Continuity mistake: When the runabout is shot by the Dominion ship, Jake is sitting in the left seat, but when he is thrown off his chair by an explosion, he is on the right seat. (00:09:10)
Continuity mistake: In sickbay, when Nog walks over to Collins, he takes her hand and returns his gold Red Squad pin. In the closeup, Collins has a long, manicured thumbnail, but in the next shots facing Nog, Collins has short fingernails. (00:43:15)
Other mistake: Nog is promoted to Lieutenant Commander but is given the rank insignia of a Lieutenant junior grade.
Answer: Part of the answer is found in "The Search: Part II" (season 3 episode 2). The female changeling told Odo that "the urge to return home was implanted in your genetic makeup. So he hardly has a choice in that. But being a sentient, thinking being, he recognizes the atrocities that his people are behind and he can't condone their actions. So it's a matter of his conscious mind warring with his instinctual gestalt. But on a more general level, we all instinctually wish to be among people who are like us. No matter how much he may like and love those around him and feel that emotion returned, there are numerous aspects of his life and existence that absolutely nobody on DS9 can empathize with or understand. And that's not even to address the pure joy and acceptance that is brought by the Great Link.
Garlonuss ★