Roger Ebert, almost certainly the most well-recognized film critic of all time, was a science fiction fan from way back. He was a hardcore sci-fi geek in high school — running clubs, attending conventions, and writing letters to sci-fi fanzines. It's no surprise, then, that he wrote many a loving review for sci-fi movies — but the films he chose to lavish that love on could be surprising.
It wasn't just the expected classics of the sci-fi genre , like "Star Wars" and "2001: A Space Odyssey," that Ebert raved over. He also granted some of his highest ratings to movies with mixed or controversial — if not just plain bad — reputations. Sometimes Ebert's unique positivity came from his approach to analyzing films based on what they're trying to accomplish, as opposed to what the viewer wanted

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