Hmmm, good question. It's more intuitive than not for me, so this is more rambles than anything else, but...
Because I participate only in transformative fandom - especially the fanfiction parts of it - I associate 'fandom' with 'I create fanworks for this, I read fanworks for this and I talk about this'. For example, then, I love Junji Ito's Tomie, but I haven't got anything transformative (in my eyes) to bring to the table and neither do I talk about it any, so I don't consider it a fandom of mine. Others may consider icon-making transformative, but I personally don't (well, it's a more 'yes, but no' thing - from a legal perspective, I'm covering my ass and saying yes, of course! xD - my emotions lean more to 'eh, not really', though) and I'm only exploring the waters of icons right now - so, in my eyes, Tomie isn't mentionable as a fandom.
Similarly, the same goes for A Song of Ice and Fire. I'm only a passive consumer of fanworks for that fandom, and I haven't got any of my own - and neither am I planning on talking about it any time in the near future.
TL;DR: If I'm passively consuming instead of creating for and talking about a fandom, and if it's only short-term, too, I don't consider a source material a fandom of mine.
no subject
Hmmm, good question. It's more intuitive than not for me, so this is more rambles than anything else, but...
Because I participate only in transformative fandom - especially the fanfiction parts of it - I associate 'fandom' with 'I create fanworks for this, I read fanworks for this and I talk about this'. For example, then, I love Junji Ito's Tomie, but I haven't got anything transformative (in my eyes) to bring to the table and neither do I talk about it any, so I don't consider it a fandom of mine. Others may consider icon-making transformative, but I personally don't (well, it's a more 'yes, but no' thing - from a legal perspective, I'm covering my ass and saying yes, of course! xD - my emotions lean more to 'eh, not really', though) and I'm only exploring the waters of icons right now - so, in my eyes, Tomie isn't mentionable as a fandom.
Similarly, the same goes for A Song of Ice and Fire. I'm only a passive consumer of fanworks for that fandom, and I haven't got any of my own - and neither am I planning on talking about it any time in the near future.
TL;DR: If I'm passively consuming instead of creating for and talking about a fandom, and if it's only short-term, too, I don't consider a source material a fandom of mine.