why why why do we take on huge projects?

Do you ever find yourself taking on huge, impossible reading projects? I know I do. Like: I'm going to read all of Louise Penny's Inspector Gamache novels before her new one comes out this fall. I have read three (the new one is number 14, out in late November. I may not make it). But why do we do this? Writer Jonathan Arlan wrote an essay about this for Lit Hub, which you can read here, explaining what keeps him coming back to the big reading ideas and what stops him from getting them done. Knowing won't make me stop, but it's fun to think about why we do the crazy things we do.