Is Roger such a bad guy?
Roger seems to have got it pretty hard on this forum but I have to say, I really liked him. I see being relentlessly cynical as a good point-I agree with him when he says 'Why can't we...see things as they really are?' He is intellectually superior to everyone around him and yet he has found it hasn't gotten him very far in life, and so in his frustration he picks people apart and subsequently alienates them.
I find most of his behaviour desperate digs at a world that doesn't seem to like him very much. He gets thrown out of a bar, Joyce's hallway and Joyce's party and takes it all with a grudging, if indignant, acceptance. When Joyce dumps him, he reacts in a way that is childish and futile but is exactly how lots of us would have reacted (be honest).
I think he respects Nick all the way through the film, he just doesn't have the words or mannerisms to show it properly. He is a friend to Nick at every point; his inevitable digs at him are affectionate and only turn nasty when he is allegedly playing 'good cop bad cop'. As for the women, he just tries to rationalise them as much as possible-a terrible but reasonably understandable personality feature. Strangely I think the woman who he gives the least respect to is Donna, the only woman who he doesn't alienate, although this is probably because he barely speaks to her over the course of the film.
Incidentally, I think Campbell Scott's performance was one of the greatest performances in any film, ever. It's amazing he didn't win an Oscar-a bigger injustice than Bill Murray losing out for Lost In Translation; at least he was nominated.