not to be insensitive and please tell me if I'm out of line, but do you mean actual OCD, or just "wanting things to be perfect" "OCD (not really)"? I've wondered how it is to play a video game with actual OCD. From what I've seen of it, it can be a really debilitating disorder.
Well it's something that means different things to different people certainly, and no I don't mind.
Imagine having to redo a playthrough (and I mean HAVING to) because you don't the way light in a certain instance makes your character look and you think a different skin tone would be better.
Or switching back and forth between a Thief that ought to be agile and have stealth and movement like a Wood Elf, but then you get to the Grove and think "is a longbow practical for a thief to conceal?" then going back and re-running as a Drow who doesn't have longbow proficiency because it feels more comfortable knowing you CAN'T use one rather than you just choose not to.
Or wanting to play as a character whose mother was a Drow and father was a Wood Elf, was rejected by both cultures and left by a roadside to be taken to the city by traders and grow up on the streets as an Urchin and being SO TOTALLY INTO THAT and wanting to basically be a Wood Elf who lived in the city but like the lore says has some physical feature of a Drow (say skin tone) and planning it all out in your head and getting to the Blighted Village where the guards who you KNOW from a previous character will think you look like a Drow and are therefore Absolute BUT YOU ARE A WOOD ELF SO THE DIALOGUE OPTION ISN'T THERE EVEN THOUGH YOU LOOK LIKE A DROW.
Don't get me wrong, I'm a perfectionist too; which is an issue in BG3 character creation because for the first time in RPG history I'm not just forced to take the hairstyle I hate least. The ones here are all SO GOOD it hurts! But then instead of being overjoyed at the good hairstyle options I instantly migrate to being annoyed that most of the make-up looks like I smeared it over my face during a drunken rampage the night before, and I can't do my lipstick at all. I can't get no satisfaction... :P
On the plus side I'm NOT the type that has to have toolbars and inventories a certain way, so there's that! But we digress, Shadowheart is a BFFNENENENENE and every PC should be able to spend the night with her; as part of a mutually agreeable consensual non-binding social contract of course!