I was using a Dremel a few weeks ago and I thought to myself "That's stupid, this bit rotates such that it causes everything to fly up in my face...they should make it rotate the other way." Then I realized "Oh yeah, I'm left handed." I'm actually ambidextrous but I write and use most tools exclusively with my left hand. With the Dremel, I have to steady it with my right hand but it's still positioned in a left hand dominant fashion.
I discovered that via research that Dremels actually used to rotate the other way, putting right handers in a potentially dangerous situation but too many people complained. I guess I should find an older Dremel. Until then I use a mask and a face shield.
I wear the face shield. I come from a family of scientists and optometrists, it'd be an unforgivable sin not to! And I'd never hear the end of it if someone had to pull something out of my eye.