on men in fandom

The point at which men feel compelled to make a separate, masculine fandom name for themselves, the better to differentiate themselves from other, presumably female fans inhabiting the same space, is the point at which they feel their gender to be not only relevant to their expression of fandom, but so important that it needs its own word, lest we confuse them with women.
The fact that men seem only to be interested in doing this on entering traditionally or predominantly female fandoms says a lot about the logic behind it. Where fans are presumed to be male, there’s no need to assert their maleness with a masculine name; where fans are presumed to be female, however, they strive to differentiate themselves, not only to void the risk of being mistaken for women, but to rebrand the actual property as being for men.
If such men were genuinely interested in disproving gender binaries and the sort of sexist logic that tries to steer their tastes in other directions, as is sometimes claimed, they wouldn’t feel the need to establish that the thing they like has masculine properties, as though they couldn’t or wouldn’t like it otherwise. This isn’t like the oft-ignored female fans of comics and videogames asserting, rightly, that such things are for everyone, which category happens to include them; it’s men expressly stating that an originally or traditionally feminine property isn’t really feminine, the better to make it for men.
Following this logic, female-dominated fandoms are only worth joining if men can make absolutely sure that their support isn’t confused with female support, or their interests with female interests, the better to assert their more selective ownership of the property. Crucially, this move also has the effect of forcing women to either accept the gendering of the fandom and adopt their own, feminine nomenclature - possibly one the men themselves have created, heedless of the fact that it was irrelevant prior to their insistence that it wasn’t, as per the term pegasister - or to refuse the binary and so have the male term become synonymous with the fandom as a whole, as though male interest is the only kind that matters.
tl;dr: If you’re a guy and your first thought on approaching a new fandom is “how do I make a name that describes my interest in this thing while letting everyone know that I’m a dude”, then do us all a favour and stay the fuck out of it.