I'm okay with remakes where the original was a good idea but was either done poorly or has been forgotten/ignored.
Generally remakes of foriegn movies qualify since 90% of America won't see movies with subtitles. That sucks for Americans, but I'm okay with Hollywood spoon feeding great stories to people who refuse to read subtitles. Hollywood wins, the American consumer wins, and I can still watch the original. Sometimes it evens leads someone to open their minds to foriegn films.
Hell, even Hitch$#@! remade The Man Who Knew Too Much to sell to Americans. And there weren't even subtitles in the original, just lower production quality, little star power, and funny accents.
But I have no idea what lead Gus Van Sant to remake Psycho. Hubris? I won't say I refuse to watch it. I have tried to watch parts. It's just so frustrating watching the same scenes done imperfectly.