SteelBird
Colonel
I believe reliability reputation held by WDD or Seagate, for normal personal / commercial HDDs; Hitachi may have a good reputation on high end HDD, but didn't stands out at normal ones.
Knowing you are from Southeast Asia, I would say "Made in China" products would have an edge to "Assemble in Thailand" ones, that may also be a factor to your cases. (Singapore don't do the "Made in Singapore" things any more)
So far as I know, there are five big brands of HDD; Western (Did you mean Western by WDD?), Hitachi, Toshiba, Seagate and Samsung. But the problem is that they must be original ones. There are too many fake things here. Sometime I even doubt that if the above producers make different quality standards for different markets (higher standard for European markets and lower one for Asia, and those "Made in China" products for example). I don't know but what's in my mind is that "do not expect the HDD to last longer than two years".
In fact, I've never changed HDD on my computer while others (in my company) have bad HDD within one or two years. I buy the same products for all. So, what I can explain is that we use our computers in different environment (I'm in air-con office while they're in hot/dusty workshop) and with different manner.