What Hard Drives Do You Use In Your FreeNAS Box?

I recently noticed WD released 6TB red drives upping their capacity aswell as WD Red Pros with extended warranties depending on intended use.. I just wanted to see what everybody is running right now and your specific drives have failed etc.. I want to run this with a series of polls but I'm not sure if this is possible with the current forum setup or with without multiple threads.. I'll compile the results and upload later..

Edit: I may use a polling site to allow for quicker / easier...

What Hard Drives Do You Use In Your FreeNAS Box?