If you think your pepperoni is too thick and want to slice it thinner, that's your call. I don't see anywhere where you said you wanted it paper thin, just THINNER. It shouldn't matter how thick anybody else likes their pepperoni because they're not eating your pizza. I would just slice it more thinly than you have been and see if you like it better. I don't think there is any particular thickness that is right or wrong. Some people even slice it thick and then chop it up.... bottom line, it's your pizza and you should have it your way!