Never "major", but they got a fair amount of focus since Geordi was stuck on their ship for a while.  A while ago there was an Trek anthology put out called "Seven Deadly Sins", basically alien-culture focused novellas, on per culture.  Romulans were pride, Ferengi were Greed, Cardassians envy, Klingons wrath. …

Well, that's more or less how they cured Pulaski in "Unnatural Selection".  Or returned people to normal in "Rascals".  And de-Tuvixed Neelix and Tuvok.

Things?  To make him go?

What do you do with a Franken-Vorta?
 What do you do with a Franken-Vorta?
 What do you do with a Franken-Vorta?
Ear-ly in the morning?

"You're all individuals!"
"Yes, we're all individuals!"
"I'm not."

As a kid I became obsessed with the movie without actually watching it.  The comic shop I frequented also had a pitiful video rental selection, including this one.  I'd stare at the cover, fascinated, but couldn't bring myself to actually rent it.  

Yeah, Canada only got the Internet in, like, 2007.

I prefer Trebek as MIB Trebek on X-Files.

It's the Ferengi equivalent of a muscle-T.

My favorite That-Works-Better-In-Retcon aspect of the thing we're vaguely spoilering is in "Nor the Battle To The Strong".  Bashir and Jake go to get the emergency generator from the shuttle, because it's going to take two people to carry it back.  After they get separated, Bashir gets the generator back all on his…

Wait, she actually IS a Brickhouse?

It's less about Risa being part of the Federation, and more about the Federation (or peaceful-cooperative environment the Federation shepherds) existing in general.

I actually liked the Enterprise Risa episode, though the worldbuilder in me as a real problem with Risa functioning as an interstellar vacation hotspot without the umbrella of the Federation.    Like, where are these people coming from, and how are they getting there, and who controls emigration and defense, etc.…

On the flip side, I liked that for once it was just people being people, and not some, "It's not really our fault, because epsilon waves were polarizing our neurotransmitters…" excuse.

One of the aspects I liked that DS9 and Voyager both skirted around the edges of was how Holotech programs were, essentially, experimental AI technology that became more than the programmers intended.  Any given holo-character— especially ultra complex ones like the Doctor— is designed to be adaptive.  So if you just…

Voyager's strength and weakness came down to not taking itself too seriously.  It wanted to be light and fluffy.  On some level, I think the writers could have been perfectly happy with plotless hangout episodes where everyone just plays on the holodeck, chats in the mess hall, or Seven tells the children that "fun…

"The Outcast" works very well because it played to an audience who might have been unsure or on the fence about homosexuality, and hits them where they live.  It takes the thing that they see as completely normal and natural (romantic love in a heterosexual context) and makes that the shamed taboo.  If you made…

There's a convention panel out there where All Five Captains are all on the panel, and it's really pretty fantastic, but Bakula is clearly the This Is Going To Be A Lot Of Fun guy up there.

"Desert Crossing", and it's more like Alien lacrosse, but… yeah.  Lot of sweaty shirtless dudes in that one, and camera gives them a lot of love while they do it.

Actually, T'Pol's Trellium-D addiction takes up a lot less screen time than you remember.  It only comes up, really, in "Damage", The Forgotten" and "E2".  Past that, it's not a significant plot point.