All drives have their problems, Simple as that. What you need to consider when buying the latest 2TB drives is how you plan on backing up the important data you store on there.
I buy drives on the basis on their complexity to repair should I not back something up that I absolutely must have, and on this basis I would choose Seagate.
WD, samsung, fujitsu - parts availability, or compatibility between parts is the issue I have with them.
We don't see so many Hitachi's at the moment coming through the lab if that says anything about the drives?