With a strong script, we also see fantastic work done by all the actors. Julianne Moore does a marvelous job and really reaches out to the audience. Colin Firth playing a homosexual man was also very very very convincing. The third character who I enjoyed watching was Nicholas Hoult ( you may remember him from About A Boy, or the famous TV series, Skins). He too has performed wonderfully. I have only compliments for the whole cast and crew of the movie and the superb job they all did in the movie.
I would say that definitely go and watch A Single Man if you are looking for something for sophisticated and out of the box. The movie is full of surprises and has an original screenplay. It may be a little dry in parts but I think that was intended by the director. If you go and watch this movie with an open mind, you will definitely walk out a 100% satisfied and content!