I love the opening with Kira and Bashir. Not only is Julian completely full of himself, but he's blissfully unaware of how he comes across to Nerys. And yet somehow I don't hate him for it. I actually like the likeability arc that Bashir had in the early days. He causes major eye-rolling, but he's just so sincere that I can't hate him.
Which is a shame, seeing as Sid's "acting" as Vantika is so painful that it's difficult to look past.
Odo's, "Never gonna happen" convo with Quark is a good one though.
"It's good to want things."
"Even things you can't have?"
"Especially things I can't have!"
I also like the scene between Sisko and Odo. I love that Sisko is good-natured throughout the discussion, no matter how hard Odo pushes for an argument.
Overall I find The Passenger to be one of those episodes that is worth the watch for a bunch of good character scenes, but not much else.