I use a helmet with a screen and ear muffs. The screen works OK, stuff still splatters in when I am wet cutting. It is just habit that I immediately activate my chain brake. For my small Sthil it amounts to a flick of the wrist, my larger saw requires a second hand. Even so those teeth are sharp and I have still nicked myself with the saw locked. I have chaps, and don't use them enough.
I have an old Craftsman my father gave me. No chain brake. Scares the bejeesus out of me. I dislike that saw but it cuts well as I don't have a medium weight saw in my arsenal (14" and a 32") Would be nice to have a 20 or 24. Might get a shorter blade for my 32" 044. Or just get myself a gift of a new saw (some how sneek it past the wife).