1TB 960 Evo at the moment. Prior to that a striped pair of 256GB OCZ Vertex 4. For just gaming I wouldn't go back. When I have time for games I don't want to sit through 5-6 minute game loads.
Only my HTPC has spinning drives, but still has a Kingston savage as a boot drive. I've got my eye on some of those 2TB drives, but I'm hoping QLC really puts a dent in the market. I wouldn't mind replacing my spinning disks with a few 4TB drives. Could probably downsize to a much smaller case (Though I suppose I could get 2.5" hard drives, but I just don't trust them)