I've seen loads of negative comments re Metallica's Reload, mostly from Metallica fans of old who think it's absolute shit on a stick. This Metallica fan of old (me) loves Reload and Load, and also Death Magnetic, not keen on St Anger at all but I don't hate it.
Apart from those albums, what springs to mind right now is Judas Priest's Ram It Down, it generally seems to be regarded as mediocre but I love it and think it's very underrated. Same with Zeitgeist by The Smashing Pumpkins, it's one of my favourite albums by them but I always seem to see it get slated by Pumpkin fans.