This is a psychological vampire film that relies more on the vampire's inner struggle then documenting a lavish lifestyle of immortality. In this film it is not glamorous to be a vampire. Romero also makes an appearance as a priest.
As much as I enjoy The 'Dead' films this might be Romero's best at least it's certainly unique that here he trims the scope of his satire down to a surprisingly intimate character study. If not his best film it's his most humanist for sure.
***1/2. After the army in THE CRAZIES, George A. Romero criticizes another pillar of the American society, the Religion, in MARTIN. The result is interesting but, in my opinion, is far from being the masterpiece praised by some hardcore Romero fans. Recommended, though.
I think Bresson is a clear influnce, but not obvious one, in Romero's work and especially in this film. "Martin" is one of the most clear, almost surgical approach to the theme of vampires that i know, and this ascetic vision reflects all the time in the composition (framing) and in the montage.