@RadAndRandom,
Robert Altman's movie is an incredible antiwar satire.
The television show shares the same characters (mostly) but it leans more towards the sentimental side of the emotional scale. Most of the series is well made, funny, sometimes heart breaking, and mostly heart warming. The acting and screen chemistry is what makes the television show so legendary and iconic.
The show can get repetitive if you end up watching the entire series but finding a greatest hit list of the better/best episodes will help you avoid this minor obstacle.