I agree that it boils down to the other person’s perception. If I were talking to someone of my parent’s generation, then I would have no problem labeling myself a Star Wars fan since they usually give the originals much more weight. If I was to talk to someone any younger than myself (I’m a filthy millennial), there is a good chance that their impression of Star Wars would be Episodes 1-7 with each one weighted the same in their mind, and now Rogue One. Since the majority of those films are mediocre-to-bad in my opinion, perhaps the best idea is indeed to say I’m a fan of the ‘originals’. Yet even then there’s a good chance that they have only seen the downright ugly Blu-rays, and so their definition of the originals is different than mine as well.
We live in different categorical worlds, we Star Wars-ites!