“We artists are hypersensitive, or we wouldn’t be — couldn’t be — artists.” — R.O. Blechman His art is instantly familiar, deceptively simple and often composed of nervous, squiggly lines depicting frail characters with enormous noses. An author, animator and illustrator with frequent contributions to the New York Times, Esquire and New Yorker magazines, at age 83, R.O. Blechman shows … 0