I've never had any problems with either WD or Maxtor... but I've found the Maxtor drives to be a little more quiet than the WDs...
The only hard drive I've ever had a problem with was my Seagate I got with my eMachine computer a number of years back, which is the computer that got me into computers.
But I would randomly lose files, and I would install programs and the amount of space it took up on the drive was sometimes far more than it should have been... Like I'd install a game that took up 300 MB or something, but then I'd check my free space in My Computer and it'd be between 500 and 1 Gig off, uninstall the game, or software and it'd sometimes go back where it should, but sometimes it wouldn't, I'd install it again, and it'd be fine.
It fixed itself when I would defrag, but only temporarily, and also when I would re-install windows. Just before I got rid of the computer, it started to work a bit better though.
It was the strangest hard drive I've ever dealt with... but I don't hold it against Seagate or eMachines, I think I just got a bad drive, it still held what I needed it to at the time, and never lost anything I couldn't get back, so it wasn't too bad.