I tend to fixate on things and try to learn all I can about them, but only on thing at a time. For example I may be interested in ancient history and spend a month or more going through all the ends and outs, but nothing else. I may spend a week or two editing my web page but then I move onto another field of interest and leave my page sitting while I'm doing something else. Some interests are temporary and some are more all throughout, but I have difficulty focusing on anything I'm not interested in.
I was once very interested in catapults. I learned the math relating to trebuchets and made plans to build one, however my dad wouldn't buy the materials so I built a little onager out of two 5Lb dumbbells, a spoon, and 20 large rubber bands. Sure it could only launch pebbles about ten feet, but I still loved seeing them fly. During this time my whole focus was on catapults and partially to related topics, but not much of anything else.
Does anyone else have similar issues focusing on only one fixation at a time and leaving all else to sit and wait until later? Has anyone a similar issue?