The Vishnans do not have physical forms, unless you take Sam's hypothesis that they 'are the ships themselves'.
Hmm, FreeSpace moments. Unfortunately I don't recall much on playing the official campaigns, I even don't remember whether I survived the supernova the first time. My guess is that I didn't, I would think I was using an Ares. I can't remember. Probably 'Dive Dive Dive' was one, like everyone else, though.
Although there are times in user campaigns I'll remember.
- The nebula mission in the Proycon Insurgency. Just so well done, and so epic. One of the best atmospheres I've encountered. Also, dying so much in that campaign, damn it was fiendish!
- The second last mission in Blue Planet. Apart from the fact that it overwhelmed my laptop when I first tried it (and many tries after), it's also an epic mission.
- Derelict. All those snipes from Mackie. 'We damn well better, and I will duct tape it to my cockpit!'
- The ending of Homesick. Really shows how sometimes all your work can be for nothing. Also, the line that sums up whenever you encounter those black and red aliens again (in universe): 'Oh my God, Shivans!'
Can't remember much else at the moment.