Nobody and nothing is unreplaceable. Art is 100% subjective. Opinions are based on your personal background, your upbringing, your education, your intellect, your likes and dislikes. Humans are fickle. Nature of the beast. Great art is timeless, trends are fashionable and seasonal. Great artistic talent is unique; everything else is mediocrity. Homeryulo, I like your work. Put up or shut up and I do agree with Kenwas has to say. Believe in yourself, man. Nothing else matters.