Part of me wants to build one of these "here is my infodumping about hobby X", but... I don't have any unique hobbies, nor any deep knowledge of any particular subject, but I think the main thing is competition.

Example. I bought and built a Gundam model the other day, cool stuff, could make a website for that... but there's already a wiki [0] that has a painstaking log of the franchise, everything ever published, etc. I have nothing to add to that, let alone do I have any right to build a website about it.

Of course, I shouldn't take it so seriously; it could be a simple blog post about "this is what I did this weekend, this is what I found, here's some pictures and some links". That'd have its own charm, I'm sure.

[0] https://gundam.fandom.com/wiki/The_Gundam_Wiki