It may be a personality quirk for sure. My mother was like this too. She'd spend half an hour looking through a set of towels at Walmart, to get the ones with zero snags or stains etc. I didn't used to be a perfectionist. It wasn't till I started buying expensive stuff like appliances, which ended up needing worked on in the first year. TV's that have boards go bad under warranty. I just reached a point I was weary of any expensive purchase, while I still don't care much on the inexpensive stuff. Then, I got into collecting. It's a love hate hobby for me. I love these things when I get settled with them. Receiving a new piece though, is pretty stressful, since I expect to have problems and wrestle with how to get that perfect piece.
Got the new 1/4 scale Endo from Hot Toys recently. The one SSC sent me had a fairly obvious fish eye looking defect embedded in the chrome on the forehead. They had no replacement heads, so I took the partial refund so I could have one. I mulled over getting a regular version from BBTS to swap out the head, pulled the trigger, and the new one has a scuff in the chrome in almost the same spot, that shines differently in that spot when the light hits it. It kind of glows dull where the scuff is. I kind of feel like the scuff is preferable to the ring indention on the first one, but it's still not perfect you know? I could do this till I'm broke, and probably have a stack of Endo's with flaws on their heads.
I think it really is a personal problem. I just want to enjoy the figure to be honest, and not be fixated on the little problems. Either everyone has to deal with this to some degree and I'm just someone who has difficulty with it, or I'm the most unlucky collector out there gettingthe flawed ones. I bet it's the former.