Well, my Male-Shep never really had a choice; Tali was nice but the whole goldfish-bowl vibe was a bridge too far, and Miranda was just too much of a cold fish, even when I coaxed her out of her shell a little... Ashley had ditched him, sooo...
The odd thing was, I felt bad the second she started crying. I thought about all those jolly annecdotes Jack had about prison rape and unethical scientific abuse and generally growing up harder-than-hard (if she ever had a childhood, which is up for debate). Whatever did go on (beyond the mechanics of the scene as presented in-game), I'd like to think it went no further than a kiss and a lot of holding. I felt sorry for her, and I wanted to care for her - pretty much a first for an RPG for me.
She was my Wrex this time around. I can see why some folk would not like the character, sure, but as far as i was concerned I found Jack the best character insofar as emotional investment. Underneath all the foul language was a three-dimensional character. Plus she had a few cracking lines