Absentmindedness

It's always worse when I'm concurrently depressed because I get about a hundred times more forgetful. I've got a short-term memory like a guppy (even goldfish have it better) and I could be wanting to throw a piece of paper but by the time I put down something I'm holding to pick it up I would've forgotten why I was headed for the bin. I can never follow simple instructions either and this pissed my teachers/sergeants (when I was in the student corps of the air force) off because they all thought I just didn't bother listening. Well I do! It's not my fault that my brain retains information about as well as a colander. You can imagine how ridiculous it was in class when my teacher would explain something and I would ask the exact same question 2 min later; or when I could not for the life of me remember the rifle disassembly/assembly drill and the (very obvious) method of loading magazines which I jammed by sticking the bullet in nose down. These are only some examples that I can think of off the top of my head. Been called spacey, blur (colloquial for absentminded), slow etc. all my life.

Oh, and distractability too, but since you asked for the worst, it's got to be ^