usually knives wont have the sharp ends facing where i would pick them up either, and yes, there are times when you need to be asthetically pleasing with your backgrounds and if the perspective is so off that it hurts your eyes, then there should be a change, but of course, you dont have to... its just heavily suggested. nobody complained that DOTT had odd and too wacky backgrounds. That perspective is a relaxed perspective....it has its own rules, but does not just scrap perspective all together.