I have shot on and off for many years. I have never used a hood. I am not generally shooting in direct light, but I've been told, pretty strongly, that I should constantly have a good on my lenses, by quite a few photographers. Yet I have seen many photographers shoot without them. I find them annoying for some reason and honestly have never seen any difference in the kind of photography I do (more recently, mostly product shots). What are you guys' opinions? I've heard the "doesn't hurt so why not leave it on?" Thanks!