gather one, gather all, for people with weirdly specific interests that its hard to find other fans for because the average person has either never heard of this thing or has never considered them as an actual interest.
for me, my most niche interests are hazmat suits, gas masks, other forms of PPE, OSHA [yes, the american government organization, im dead serious, no i dont work for them, read the OSHA guidelines get unionized etc.], and GIFs [not necessarily too niche on paper, but i like them more than the average layman]. i also have a much more minor interest in forklifts, cat genetics [not also necessarily too niche on paper, its a whole field of study, but i still wanted to count it], and nuclear radiation. can you tell im autistic LOL