Any NPC's you wish you could have romanced?

Blonde Miranda....

Captain Wasea - she played a small part but it would have been nice not to volley her with biotics ..

The only NPC's I ever wanted to romance was Gianna Parasini and Maya Brooks.

Gabby Daniels

Shiala

Aria

Jack (as FemShep)

Feron

I said Nyreen earlier. I would also go for the Female Turian in the Citadel DLC because yes, she's a Turian.

As others have mentioned, Jack should have been available for femshep. Love that badass biotic. (My Helena Shepard totally had a thing with Jack before/during her thing with Garrus during 2.) Also, since Liara and Kaidan were available to both male and female Shepard, I feel like Garrus and Ashley should have too. More LGBT characters is always good. Would have romanced Aria, and a few others, if available, but I generally prefer to have my character in a relationship with a teammate. (With the exception of Traynor because she is too perfect.)

Gianni Parasini without a doubt. Things were looking good on Illium in ME2 then just like that she's gone forever. Gutted.

Shaira, Aria, the two guards from the walk through, Chambers, Chamber's replacement (who's name is completely failing me atm), EDI, can't think of any others atm.

Oh my gosh, yes. That was like barely Consensual.

I'll need to look up the Javik one tonight. I suspect they didn't have the resources to actually create naked aliens, so they either keep their armor on, or you get a fade-to-black. Or both.

Joker. I'd be gentle.
Javik
Primarch Victus