When I originally thought of this question, several days ago, I thought my answer might be just a few minutes, from the time around whenever I tested my sugar, or gave a bolus, or checked for ketones. But the next few days I really concentrated and tried to recognize when I was thinking about diabetes, not just my sugar levels, but also about the future of treatments, and how I would be affected at school, going on different websites like this one, or anything else, and I came to the conclusion that diabetes is probably the biggest thing and is on my mind most of the day, and I've just gotten used to it as always there.
Then I came to a different conclusion, that this constant thinking and subsequent worrying is what is really taxing on me, my normal life is just constantly thinking about this disease. Thinking all day about how I can control my health, on a problem which wasn't my fault, certainly couldn't be good in any form.
Then I realized diabetes has not limited my thinking capacity nor train of thought, but rather given it a direction, a purpose on which to place my thoughts, dreams, and what I learn. If I can relate what I perceive around me to my diabetes, I will critically analyze and remember it more, and that is always a plus.
So, just a thought I had.