@Fritillaria2 oooooh yes, this can be a big problem for me at times. I've never associated it with my adhd, though that makes sense.
Usually, if I'm going to do something, I MUST do it in a very specific way, or it feels like it's not worth it at all. I tell myself my rules are the "best" way to do the thing, ie most efficient or whatever, but I am so obsessive abt them...
As a result, it's hard for me to adapt and "roll with the punches," so to speak.