Since the creator of TMA says that Jon probably collects something just a little bit weird, I’d like to throw out a few guesses on what I think Jon might collect:

My first thought was that he collects pinned insects. Specifically moth’s and beetles, but he has a little bit of everything other than spiders. I don’t really have a reason to think this, it’s just the vibes.

Speaking of vibes I could also see him collecting pens that look unique in some way. Maybe some have signed some important document along the way, but most are just for aesthetic purposes. I could see him collecting unique looking pocket watches for the same reasons. Or old hand bells that have a pleasant ring.

Outside of aesthetics I could also imagine him collecting signatures from fairly important people. Jon seems like the type of person who would be proud to have something like that, which I don’t think would be as true for my other idea that he collects erasers. I don’t know why I think he would collect erasers, Jon just seems like that type of dude.

From a more “in-character” standpoint I could also see him collecting lighters. That would explain why he got a weird lighter in the mail and then never questioned it. I could also see him collecting book covers since he likes to read. And I’d also like to put forth the idea of him collecting old tea cups or mugs from all the Jonmartin shippers out there.

Anyway! This was supposed to be a short post but then I thought about all the “weird but not cliche” things Jon could collect and my brain started acting like a Jack Russell Terrier who’s been in a crate all day.