Am I the only one who doesn't like the KotOR romances precisely because they seem so forced? You can say "They rise from the plot" but the fact that they both fall for you regardless of who you are seems wrong. I hate Bastilla, call her out whenever I can, act as a dark side jacknife and...she still falls head over heals for me. That simply doesn't make sense.
Furthermore, if you don't like either and decide not to pursue them, it feels like the game hates you for it. You obviously are supposed to romance them, so Carth's "YOUBETRAYEDME!" and Bastilla's "I will seduce you to join the dark side!" acts don't carry the same weight when you haven't been particularly close to them. It feels like I'm mising a key part of the plot becaue I don't like the one love interest I'm destined to choose (both of whom are pretty uninteresting compared to the other characters in the game).
I'd rather not have the romances tied into the main plot for that very reason: the plot falls apart if you don't pursue them.
Instead, I'd like to see more depth in the romances, with the main plot effecting them rather than requiring them.
Mass Effect 3 actually falls victim to this exact problem. Despite the myriad of options in ME3, the game quite clearly wants you to romance Liara. Every scene between Shep and Liara, especially their last one, has an undercurrent of romance. If you don't romance Liara, it just feels creepy. She seriously feels like the unrequited lover who just won't go away, but the game gives you no way to acknowledge that.
Rather than have the romance drive the plot, it SHOULD be secondary. The plot should effect the romance, not the other way around, and the romance should effect the character you're romancing. If the romance is only there because the plot demands it, it feels shoe-horned rather than a bonus for people willing to put in the time (and suffer through awful romantic dialogue).
Romancing Merril in DA:2 or Blackwall in DA:I felt much more rewarding than romancing Carth or Bastilla because of how Merril and Blackwall's personal quests effect your relationship and force you to evaluate how much you care about them vs how much their behavior tests your ability to forgive, not because the game developer tokd me "Your character really loves Merril because...um...she's the only one in the party that will let you in their pants?"
Rather than just forcing one romance on the player, Bioware should work on developing deeper and more realistic ones.