My least favs are Nadia (the whole relationship reminded me of a teacher taking advantage of a student) and Kaliyo (she`s the kind of person I hate in real life, I disliked her more than I dislike ANY other npc in SWTOR).
1) The teacher/student dynamic might work pretty well for a Dark Side consular who just tells her what she wants to hear.
2) I swear, I think Kaliyo was originally intended to be a bisexual character at launch. Her behavior, her dialogue, and her personal history remind me a great deal of some of my lesbian friends. I'm really surprised they didn't leave that option open.
So she might not be the best match for a person looking for a relationship with anything resembling traditional gender roles.