I have three mask. Two Guy Fawkes masks, one I bought online, other came with the deluxe box of V for Vendetta(best version of it you can buy), and a Shrek mask, was a christmas gift when I was like seven best gift you can get a kid.
I have a shemagh I am quite fond of. I usually have it in scarf form, but for cold days it takes on a balaclava form. I'm not sure if that counts as a mask, though.