In that specific case? You're a fan of the essential core series, that's how. But as a general rule? You can be a fan of any part of a series and your fandom i

In that specific case? You're a fan of the essential core series, that's how. But as a general rule? You can be a fan of any part of a series and your fandom is completely legitimate. If you know all the details of three movies that puts you head and shoulders over someone who watches everything both uncritically and superficially. I mean, you like what you like -and I'd say it's a question of depth of "liking" (knowing the lore, etc) rather than being comprehensive (liking anything that has 'star wars' written on the label).