same as Capitain.
I will never forget being hit by truck (just scratched slightly actually not hit) and i forgot to fasten helmet so it was puled out from my head, but still saved me.
I can't believe that im saying this but i thankfull for a policeman in my village who was always stopping me and giving a bill to pay (only me in the whole village!) "you only one here who riding big bike and it has a red number plate, so you must wear it even when ride to 7eleven" he said. He was freaking my brains for a long time so i decided that its easier to wear a damn helmet than listen to that old guy playing wise man. Well now im thankfull to him,
and wearing a helmet is a habit now, i can't imagine situation which will take me out of home without helmet, and by the way its really uncomfortable to ride without one- all this dirt and flyes- is distracting.
My choice is simple "Real" thai brand helmet, but it has done well in plenty of get-offs both on and offroad. Now i got new "HJC" offroad helmet wich turned to be much more filmsy than "Real" one, so take it as advertisement by user.