Being a huge geek about the field you're working in is usually more of a disadvantage. Just because someone has seen thousands of movies and can rattle off random facts about any film ever released does not mean that they have any talent whatsoever. Everyone here - from the simple experience of posting on message boards - should know this to be true. If you don't have a good impression of it, just go to IMDB and see some of the ideas and fanscripts passed around.
Talent is talent, and some people who are massive, devoted fans of movies/comics/etc. will never be able to make anything of quality.
Like I said, Tarantino is one of the rare ones who can, and he uses that to extract what he loves about movies and distill them into incredibly entertaining films for hardcore fans and casual viewers alike. I know I compared him to Moore earlier, but he's actually more aptly compared to Morrison. Morrison has done in All-Star Superman and New X-Men what Tarantino does in his movies.