Seagate/WD/whatever... Everyone has bad batches now and then, and unless you're talking to a SAN admin, most people don't deal with them enough to get good pictures... and if you ARE talking to a SAN admin, then they're likely bringing a whoooole lot of baggage along that you'll never have to deal with anyway, so it's "grain of salt" territory there, as well.
There. That wasn't that hard a drive question. Your thread title is misleading.
WD drives are less shit than the others. 5 year warranties against the others 1 year. If you're doing raid the WD reds and WD re4's are raid specific. If it's not mission critical you could go with samsung for about 2/3 of the price.
I thought Seagate had the 5 year and everyone else had 3 year? Either way, I've had great experiences with both of them.