Speak of the devil... only just today I took out the WD Scorpio (2.5") Black from my dead laptop and tried it on a borrowed desktop (a terrible one which didn't even have an installed OS) where the other hard drive was... *ding ding* a Seagate Barracuda. According to the bios, the Seagate Barracuda was the only detected drive and the WD drive was never detected. The WD Scorpio Black never had issues and since my laptop died last Sunday (due to MB failure), I've only taken it out today as I lacked to correct screwdriver to do so sooner.
The WD Black didn't work with a budget HD enclosure, while my Intel SSD (from the same laptop) worked fine. My newly bought tablet's keyboard dock (came with 500GB HDD) didn't detect it either, but I never tested the SSD on it. Either the WD Black is very fussy and won't connect to certain inferior hardware or it somehow died within the past 7 days after just 2.5 years of use and no issues. Never even made clicking noises. This is just one experience though and I'm taking it to the shop tomorrow to confirm whether it really is dead. On the other hand my old Q6600 system had a Seagate Barracuda hard drive which lasted over 4 years. It never actually died, but was close since it made the tell-tale clicks and was very slow.
Should my experience put me off WD Black? Funnily enough I have some WD Passport external drives which have always worked perfectly. Otherwise so much for WD Black's good reputation. I was planning on getting a few Caviar Black for a summer gaming desktop build to replace my dead laptop.