I have only one criticism of this film - and that is that it first appears as generic romcom featuring a lonely heartless man who's life is, over the course of the film, enriched by those around him. Including the token cute animal. I confess, I had to be coerced into watching it by a large group of friends.
However, to actually watch this is to witness the re-writing of the romcom genre. Jack Nicholson takes insulting the people around him to a new and wonderful level, that leaves you crying with laughter, whilst at the same time releasing your inner Melvin and making you feel deliciously wicked at the enjoyment of such base and lowly humour. Helen Hunt is the surprisingly well-coiffed single mother, who remains beautifully human whilst being the heart of the film. Throw in Greg Kinnear and Cuba Gooding Jr's characters as the butts of the gay and black jokes, and you have award winning stuff.
Finally, this film could not be what it is without the pampered pooch that begins the film as the apple of the eye of Simon (the gay neighbour) and transforms into a canine Melvin, even picking up his OCD ticks along the way. 5 stars!