I’ve heard it’s related to time blindness. Basically I can’t become invested in a project if I know I’ll have to break out of it shortly. So if I have an appointment at like 1pm, I either have to start my day really early to make sure I can get like 6 hours of work done before noon, or start my day after the appointment and work into the night.

It’s a lot easier when I’m on Ritalin, but it’s still difficult to plan around.

That’s basically why I always schedule any appointment for early in the morning, if I can.