Same, I've always been careful with what I download!
On another note, I ordered a 500GB Hybrid SATA/SSD hard drive today; basically a 500GB drive with 4GB of NAND storage. It monitors your habits and pre-loads the NAND memory with the things you're most likely to use. In tests it's almost as fast as an SSD and spanks any normal disc drive.
I'm going to pop it into a USB 3 caddy, should be seriously fast!