I have 2x samsung 830 120gb ssd's, 2x wd 500gb black, samsung barracuda 1tb, seagate barracuda 3tb drive.
SSD's i bought few year earlier cause they were cheap and many ppl recommended them. So i bought 2 of them and placed them into raid 0 for os.
WD 500gb drives i bought also few years earlier for "friends" to my other 2 500gb drives and placed them into raid 0 for os and other stuff. Bought them cause black seriers was good at those days and they were cheap (35€ one) compared to the prices in thesedays in Finland. I use it for my games.
Samsung 1tb drive i got with my 1st custom build pc. When i bought it, my previous pc had only 80gb drive which was small... So i thought lets just get one big drive for start so i dont need to get more drives (but when getting more space for your bits, the hunger keeps getting stronger). Mostly music and other files for school and so on.
I bought Seagate 3tb few weeks back to replace my 2tb drive which only had few gb's left of free space. Bought it only cause it was cheap and cause it was external so i got the case for external drive if i need it later on. This one is for my backup and for my movies,videos.
My mediapc
2tb drive (WD green series) i placed to my mediapc cause it didnt have eny hardrives yet. It also has crusial 250gb ssd for os. I choised cause it was cheap (again...) and finnish forum called murobbs recommended it for me.