Updates in for Qyzen, Tanno Vik, Vector, and Doctor Lokin.
I'm starting to suspect that some of these spots are only trigger-able once. Not sure if it's once per companion or once period, but after taking some of these guys back to the spots on a different day nothing's showing up.
There does seem to be some kind of randomness to the dialogue triggers. Sometimes they'll say their line every time that day that you go by, and sometimes not at all but then they will the next day but not the first time, or only the first time, or every other time, or... It's very inconsistent, which makes this whole project a little more difficult.