Just had a Seagate die on my boss yesterday. How timely.
I have had a seagate drive for more than 5 years, its a 1tb external expansion drive that I removed from its casing and moved into my pc.
It has yet to fail but its getting noisy and I think its time to make a switch, I got my younger brother a 1TB WD Black drive that runs at 7200RPMs and its really quiet.
I'll probably get the same thing, wish WD would release some SSHD's though, my best bet is a WD Black right now though, since WD Blues aren't fast enough for me. Also for the curious I don't use a HDD for my OS I use a Samsung 850 Evo SSD thats only 120GB big.
I have also been thinking of getting a 3TB WD Green for whole system backups though.