Just learned the term panacharakin. I suppose it describes me well, although I don't think I fully identify with it. While I'm connected to all versions of Dipper across established fanon (pancharahearted?), I don't feel like I had infinite past lives as reverse dipper. I definitely have one canon. My connection might also have something to do with the gravity falls fandom's strong AU culture in particular, as most other fandoms don't have that. It's also worth noting that I'm more connected with some AUs than others, I identify more with monster falls than relativity, for instance. I've digressed by now, but it's a nice term to know.
Edit: also, I believe doubles exist. Not sure what's up with that discourse, but I don't believe I'm the only true dipper (or even the only true reverse dipper. As unlikely as it is, there has to be someone out there). It would be hubristic of me to do so.