I used to be annoyed by people who lived on a schedule, but I have become one of them.
My life is now planned out because I function much better when I do so. If things aren't written down, I get extremely stressed and agitated because I know this typically results in me forgetting things I should remember. (I am finding my iPhone and AppleWatch to be helpful with my "scheduling" and as a "memory aid.")
The other part of this is when I have a list of tasks to do for the day, I will obsess over them until their completed, and I become upset if someone tries to add to or subtract from my plans for the day. All of this had led to me being a rigid and less spontaneous person.
Reading all of that, you would think I wouldn't do well with any type of change whatsoever. I don't believe this is true. I seem to be okay with change as long as I am in charge of the what, when, and how. If someone else is in charge, its a completely different story.
I don't write these things down simply to make excuses for myself. One of my pet peeves is people not owning up to their responsibility, and I don't want to be that person. Thus, I have to own my faults and I will continue to work on them.
I also want to share my experience as a survivor so that if you are in regular contact with someone dealing with a TBI, you might understand them a little better.