It took 26 years for JoJo's Bizarre Adventure to get a proper anime adaptation. Berserk is getting one after 26 years as well now. What other popular manga or light novels took a really long time to get a true anime that wasn't an OVA?

By "true anime" I mean an adaptation that was faithful to the original source and contained most if not all of at least two complete story arcs without straying away. http://ift.tt/1mNM2kw