I can just tell from my personal experience and I'm all for Seagates.
Never had issues with it (okay I flashed that FW on the 7200.11 early) but from WD I had 2 total losses. Hitachis I don't know, had 2 older IBMs before Hitachi got the business, they were quick but hot and reliability... well they were the "Death Star" successors. Didn't went boom but one started to make sounds. Samsung I have a few which do okay.
Seagate depends from series to series with the warmth but recent ones are neat and are fine with power consumption and noise. (And I compare from older as 7200.7 to 7200.12, IDE and SATA).
But everybody will tell you a different story on HDDs.
Stop TCPA, stupid software patents and corrupt politicians!