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).