I think it can do some good as long as we don't forget that it's fiction and that real life can be rather different. I always like watching genial, friendly characters, the kind that make others feel respected, safe, entertained, etc. I also like watching characters who give people bad news in ways they can more easily cope with, and characters having arguments that they end up resolving. I don't try to directly copy their behaviour but I think some of it rubs off on me naturally, and I find myself absorbing some of the principles that their behaviour underscores. Conversely I see characters I don't like and I think I learn to avoid behaving like they do, at least to a degree. There's a lot in novels as well as movies and television. But fiction is by definition a lie, so I think it's important not to lean too heavily on it.