You know what they say about assumptions...

Fun fact: George Takei himself complained that Sulu is portrait gay in the new movies. He said that even tho he himself is gay, he always played Sulu as a straight guy. But why would the headcanon of an actor be more important than any other

With the debatable exception of Jadzia, all those characters were exclusively shown in heterosexual relationships.

Rejoined was a great episode.

Kira was a rebel at heart.

Bashir was in the "I've been genetically modified, which is illegal, so should I have kids?" camp, if I remember correctly.

Sisko loved his wife.

Odo was a gelatinous blob.

Jadzia was influenced by past multiple personalities, so she likely loved pans and pots.

O'Brien was a weeb. He only loved his waifu, the transporter room.

Jake was a reporter. He loved crawling into holes he shouldn't have been crawling into.

Quark was a businessman. He loved risky ventures.

Although it isn't really shown, Odo is nonbinary by definition isn't he?

Quark is a straight white male, or my name isn't Jeremiah Paxton

Agreed on all points except Garak, the simple tailor.

Anybody who misses how shamelessly he flirts with Julian needs their head-canon checked on.

Isn't cis another word for straight?
I honestly don't know, just asking

Nog is straight. But also an incel.

Everyone knows...when you make an assumption...

Ah yes gender politics, only thing missing from Star Trek themed discussion.

This is wishful thinking. It was made within a heteronormative society, and most characters who have love interests and relationship histories are hence straight.

Unless stated or shown it's far more of a head cannon to assume a queer identity where none is suggested.

No media can fully escape the culture, period, and context it was created in.