People either love or hate Plant. Personally, I love the wailing. Bonham is seriously the greatest drummer of all time FTW. Page is up there. Obviously can't top Hendrix, and I think Stevie Ray Vaughn outclasses him as well, but he's still fucking amazing. Jones gets hardly no recognition, but the dude was a damn good bassist and could produce just as well as Page quite frankly.
A lot of their stuff has a gritty feel, so I understand what
@airtime143 is saying. I think Page said he often left the mistakes in the recording because it was a better feel and more real or some shit like that.