completist noun [ C ] US /kəmˈpliː.t̬ɪst/ UK /kəmˈpliː.tɪst/

a person who is extremely interested in a particular subject and who wants to collect or experience as many things as possible connected with it, so that his or her collection or experience is complete:

You don’t necessarily need these new releases unless you are a completist who has to have everything Hendrix ever produced.

In my case, yes. The two most recent examples are,

1. I was determined to identify, locate, and photograph every location used in the film BOOGIE NIGHTS.

2. During Covid (Spring, 2020), I decided to walk every street in my suburb.

How are they going?

1. I’ve managed to log about 50 of the 55 or so locations used. If the Location Manager on the film would stop ghosting me (I’ve now reached out to him thru 3 different people), I’d be able to complete this one. :-\

2. It took about a year, but I was successful. I found it so rewarding (I pick up litter on every walk as well) that I expanded it into the suburbs on either side of mine. The good or (bad) news is that I live in an enormous metropolitan area (Los Angeles) so I’m going to have to set some limits if I’m ever going to complete anything.

https://i.imgur.com/e1zlGPR.jpg