Re: If you could add ONE line of dialogue to STID, what would it be..?
The Khan line never really bothered me (then again, the moment Harrison revealed his identity in the movie, my son yelled out "KHAAAAANNNN!", to a quick shush from us, and a few giggles from others in the audience).
I would have definitely changed Scotty's "One-day" line though.
"A perfect organism, unclouded by remorse, or human illusions of morality." - Ash, Alien