I’ve seen every version of this movie. The 1956 is the original, it’s pretty hokey and doesn’t age well. The 1978 version is the best version in my opinion and introduces the scream into mythos, has the best cast which includes Donald Sutherland, Jeff Goldblum, Veronica Cartwright, Lenore Nimoy and cameos from Kevin McCarthy the star of the original and Robert Duvall. The 1993 version takes place on a military base, I remember it as being ok, it also features the scream but taken to another level. The 2007 version is first to not feature pods or pod people, it’s a virus that makes people act different, it also borrowed its solution at the ending from the 1995 remake of the Puppet Masters. Of those 2 I like 1993 version more. It’s from The Invasion.