Which did you see first: M*A*S*H the movie or M*A*S*H the TV show? I saw many, many episodes of the TV show before I saw the movie. I was used to Alan Alda's Hawkeye. When I saw the movie, at first I was put off by Donald Sutherland's Hawkeye, but after awhile I was just full of admiration for his acting.
Let's face it - Alan Alda is a tough act to precede.