It just sounds to me like you "may have" attention deficit because you tend to fixate on something and then tire of it and are ready to move on to something else. That "can" level off with time and maturity, but, you have learned how to fixate for a while with a passion and then move on to something else. People who have this challenge do best in careers where they move around more, my older brother was/is like this and his career was in sales and flying all over the country to different places. My husband has this too and he also likes to be in motion and over the years has learned how to do all kinds of things from plumbing, to installing windows, to accumulating knowledge about "how to" do a lot of things and he has his own business where he is constantly doing all kinds of different things. It is just the way his brain "likes" to be in motion and doing different things verses just the same ole day in and day out.

The truth is way back when, human beings needed to be this way to survive and move around and have that ability to "fixate" on new territories and hunting grounds. Well, that is very different than being designed to sit at a desk all day as many do now right?
Often a person will mention how they learned how to open a store for example but once sitting in place in that store discover they are unfulfilled and "bored". Well, that means they need to consider their real joy was in learning all that went into having a store, but they are not designed to "just sit" with that, but instead have something that keeps them "in motion".