...I have heard of many GFCI nuisance problems but have never personally known of anyone having or being injured by the type of fault they protect us from.
@Eddie_T - I'll be your first then :O), I was ~7 years old (circa 1972ish), in my grandparents bathroom, my hands in a sink full of water and I grabbed the medicine cabinet. Threw me 3 feet backwards, not really hurt but very surprised!! Somehow or another the vanity light was shorted/grounded and I was the least resistance to the floor.
So does that make me the poster-child for GFCI's , not sure they were around before that??