Horowitz is probably my favorite classical pianist; his interpretations are at one time fiery and have sort of a nervous energy about them, and at another soft and whimsical. This, however, is not what makes him a badass.
In 1988 Horowitz was nominated for (and won) a Grammy award for his recording of Mozart's Piano Concerto No. 23. However, he skipped out on the Grammys in favor of receiving the National Bow-Tie Wearers Association Award. And for that he earned my undying respect.