for me its choices with no concequence (cough mass effect),
but even bigger than that is poorly done romances, i actually really like a good romance, i think they nailed this in Witcher 2 (the characters had chemistry which is difficult to do especially in a video game)
and in Dragon Age Origins they did it really well, some characters were almost impossible to romance unless you brought them along with you on missions and you did things they agreed with (which another romance option may disagree with) and they actually got mad if you cheated on them
in mass effect 3 (yes i know but shut up) i felt is though the romances were just there, it was a long game and i felt i like i had 4 conversations with liara where i could try to woo her (with jack i had 2 conversations and a very very brief third). in fact the entire ME romances were done poorly, you just had to talk with them and then select whether you were going to shag them later, thats it! doesnt even matter what you say aslong as you pick the ONE right bit where you say your interested
