As far as I can tell, Liara's love is genuine for a romanced Shepard. It always seemed that way to me. In the beginning, it might have been more of a hero-crush because she really didn't know what kind of person Shepard was, aside from the fact that Shepard saved her life (and doesn't even have to be nice about it), but their feelings can develop over time if they go for the romance path.
The strange thing is that she still seems to have feelings for a Shepard who, at every opportunity, gives her reason not to like him. Shepard can be downright mean to Liara - during her recruitment, in conversations by telling her that he/she doesn't trust Liara, not caring about her feelings when her mother dies, yelling at her in the Normandy lockdown scene, and more. In one of my playthroughs, I chose the "I'm not interested" line instead of the "Let's be friends" line (because that Shepard didn't want her as a friend), and unfortunately fell into the romance trap because that line has a glitch, but even after Shepard did all of those things that I mentioned above... she still wanted to be with him, even though he never said one nice thing to her.
I can see how, if a Shepard who really did care about Liara and romanced her started yelling during the lockdown scene and she stayed with him, it could be a great emotional scene that shows Liara will still stand by Shepard when he/she is just angry at a seemingly hopeless situation. But if this scene happens for a Shepard who never showed her any kindness, even before that moment... it comes off looking like she can't take a hint, and doesn't realize that's not a good relationship for either one of them.
In that scene, my Shepard was just trying to get her to
leave him alone and realize that he doesn't like her. But to think that this same dialogue could be played out for a Shepard who actually does want to be in a relationship with Liara while still treating her this way is just strange. You'd think she would see that she deserves more than that.
Dean_the_Young wrote...
Bioware really should implement distinguishing love interests: the sort who won't get into relationships with people who are rude, nasty, or ideologically opposed.
This is exactly what I would like to see in future games. My Shepards take all of this into consideration when choosing who they want to have a relationship with, and other characters do the same.