On my female IA I would have liked to get Sanju Pyne as a companion and romance option after Balmorra. He's cute and more fun than Vector
And being stuck with that b.... Kaliyo till Alderaan was really a pain
As a male IA, I second Sanju in a totally platonic, 'would be nice to have someone on my crew who is relatively well-adjusted/not damaged and or insane in some way."
Thana Vesh would have been interesting, though IA's would probably not get her do to Bioware's aversion to non-Sith/Jedi getting Sith/Jedi companions. Which is how we got Vector, the Sith Assassin in bug mans clothes.