I read back to back Part 4 of World as Will and Representation many times in a 3-4 year period. To this day I will use phrases and concepts from Schopie in conversations or when pondering about something. To me he was the greatest philosopher ever alive and I would like him to be cloned and forced to absorb the modern context and give us a thesis.
He wasn't perfect, however. I grew out of some of his stuff. I particularly find concerning that he commended asceticism but biographers and he himself paint something quite removed from asceticism. In my opinion, you need to practice what you preach. This is why I still try to stop jerking off, lol.
Still, his explanation for religious celibacy makes sense to me. It's borne from some type of understanding of life being something that might be best stopped and not propagated. But I don't completely know at this point what I really think. It just sort of makes sense, and people breeding certainly looks like mindless animalism.
For me his biggest accomplishment is a successful characterization of the essence of life as an inmaterial, fatalistic WILL, and the logical defense of metaphysics that he also presents successfully. Not ex nihilo, neither ad nihilum. Basically he argues perfectly in favour of essences being a thing, (or THE thing), which modern "intellectuals" obviously dispute. As long as you believe in essences you believe in metaphysics, or, as dreaded as it might be, you may even be a spiritual person.