
Roger Ebert is an institution of the film industry. Not because of his particular genius (he gave Garfield: The Movie three stars), but because of his longevity. He’s been reviewing major releases for nearly thirty years. Looking back at a collection of his reviews is like looking into the history of film criticism at the end of the 20th Century.
Consider, for instance, his review of RoboCop:
Because the scene [where the OCP executive gets murdered] surprises us in a movie that seemed to be developing into a serious thriller, it puts us off guard. We’re no longer quite sure where “RoboCop” is going, and that’s one of the movie’s best qualities.
[...]
The broad outline of the plot develops along more or less standard thriller lines. But this is not a standard thriller. The director is Paul Verhoeven, the gifted Dutch filmmaker whose earlier credits include “Soldier of Orange” and “The Fourth Man.” His movies are not easily categorized. There is comedy in this movie, even slapstick comedy. There is romance. There is a certain amount of philosophy, centering on the question, What is a man? And there is pointed social satire, too, as the robocop takes on some of the attributes and some of the popular following of a Bernhard Goetz.
By way of comparison, here’s his review of Starship Troopers, a decade later:

"Meesa be on da movie poster!"
Today, May 19, 2009, marks the ten year anniversary of the release of Star Wars Episode I: The Phantom Menace. Yup, it’s been ten years since George Lucas gave the gift of Jar Jar Binks to the world and did irreparable harm to the standing of the Star Wars franchise in popular culture.
Ten years later, it’s easy to lay such scathing criticism of the film. The pop culture idiot savants of teh interwebz quickly formed such a consensus, and further (marginally better) installments of the franchise failed to completely reverse the negative perception of this film.
But ten years ago, were we all on the same page? I suspect not. Not even all critics were universal in their opinion. Most famously, Roger Ebert gave the film 3 1/2 out of 4 stars and called it “an astonishing achievement in imaginative filmmaking.” And I’m sure plenty of moviegoers came out of the theater thinking they had seen a thoroughly enjoyable action ride that was a worthy edition to the Star Wars franchise.
I should know. I was one of them. This is my confession.

"Oh. You've been a bad boy."