Personally I've never tried them, but from the reaction I've seen of those who have, I've no intention of trying them.......they look disgusting & no doubt taste the same.
I love them both, but I do take the pimento out of the green ones before I'll eat them. I used to love putting the black ones on my fingers when I was a kid and then eat them off.
I use to say I will never like them, but then I tried the Black Olives and I love them! I am not to sure about the Green Olives though( I have not been that brave to try them).