In my play through (Male Shepard Infiltrator paragon)it worked like this (in my order of favorites).
Garrus: My Home-Turian
Tali: My Lady
Liara: That woman you slept with once, managed to become friends with, but there's still a little tension there.
Javik: My Unfrozen caveman murder machine
James: My Meatshield / trainee
Kaiden: A ham sandwich I forgot I made four hours ago, rediscover, and quickly remember why I didn't eat it in the first place.
EDI: My laptop?
Shout out:
Mordin: I cried when he started singing.
Legion: He became a real boy (before sacrificing himself to make all Geth real boys) making me cry in process.
Jack: She grew up and finally became interesting.
Grunt: Him walking out of that Rachni cave was a crowning moment of bad ass.
Kasumi: The only person I'd be cool with calling me Shep... ever.
Time out:
Jacob: Still not interesting... at all.
Miranda: Yes, you look good in that unitard thing, but I don't find you interesting.
Samara: Going from rigid Lawful Good to Lawful Stupid.
Zaeed: Don't like you, never will.