Akin to the TV series 6 and beyond.

Rating: Null/10 (25 June 2003)

*MINOR CHARACTER SPOILERS HEREIN*
Though being a huge fan of the series (they're still showing re-runs in the UK), I've only just seen this movie for the first time, and I thought that most of the movie's characters were more akin to their replacement characters in the series than their namesakes, both in appearance and in personality.
First off there's Frank Burns, who seems more reminiscent of Charles Winchester in the series. Aside from the physical likeness, Frank's character is much more three-dimensional and a little less neurotic than in the series, where he can be a little OTT at times. However, in the movie, Frank is not one of the main characters as he is on the tv.
Next there's Trapper John McIntyre (Played by Elliott Gould), who sports the image of a moustached BJ, but with darker hair/skin and less baldness. Whereas the TJM of the series spends most of his time lusting over nurses, this incarnation of him seems much quieter and contented as BJ does in the later series on tv.
And Henry Blake, whilst sporting a 'proper' Henry Blake-ish image, seems much more together than his tv doppelganger. Whilst the TV Henry gives the impression of being permanently confused/overwhelmed needing Radar to help him with everything, this Henry seems more in control with Radar just as an assistant, more like Col. Potter on the tv.
One more thing. Whilst Hawkeye is the main focus of the series, it seems there is no "main character" within this film. Every character gets his or her moment to shine, and most of them are regarded as equal.
Overall, this is a very good film with the same dry wit and gallows humour displayed in the series, but definately not what you'd expect by looking at the character list.