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Whether someone is a “go-getter” or a “slacker” may depend on individual differences in the brain chemical dopamine, according to new research in the May 2 issue of The Journal of Neuroscience. The findings suggest that dopamine affects cost-benefit analyses.

The study found that people who chose to put in more effort — even in the face of long odds — showed greater dopamine response in the striatum and ventromedial prefrontal cortex, areas of the brain important in reward and motivation. In contrast, those who were least likely to expend effort showed increased dopamine response in the insula, a brain region involved in perception, social behavior, and self-awareness.
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I classify as a work-a-holic and have trouble relating to people that do not seem to have motivation or old fashioned get up and go. Are these tests going to evolve enough to help people both that are too active or sluggish. What is the purpose if not. Bland information is not enough. What to do about it is.
Work smarter, not harder. Working harder is for ants!
But it the adrenaline rush. I like the physical activity. The tired from being physically active is a good tired. I use the smarts on other things but activity loosen the stiff joints and helps with the mobility of the body. I trive on it.
I wonder if dopamine flows are drawn to brain regions that get the most use. In other words, future-directed goal-seekers who have clearly defined goals might attract dopamine flows in their striatum and ventromedial prefrontal cortex, because that's where planning and analysis required to reach specific goals takes place. On the other hand, less "ambitious" but more creatively-driven individuals — who are more responsive to their limbic-induced emotional memories via processing in the insula — get dopamine flows there because their thinking is preoccupied by resolving emotional turmoil from their "looking back" perspective.

I guess i'm wondering if dopamine is the effect and not the cause of these two polar perspectives toward life. Does thinking make the chemicals flow?
I think I can equipped with an overdose.  How to get rid of it is the problem. ????????? I do not understand lazy. I do not understand wanting to sit. Not my thing.
"I wonder if dopamine flows are drawin to brain regions that get the most use"

+Brad Acker Well here's an article, similar to the OP, where they describe dopamine going into different areas of the brain:

here's the study that the article(s) were featuring .. probably the same study:

But I don't think they mentioned anyone doing a background check on the participants of the study to see if they used a particular side of the brain most of the time.

That would be a good study to do though. I wonder where those folks put their suggestion box for new studies to do.
+E Narcisse I think is is inherited.  My dad was a no stop worker.  I am ambidextrous so what does that mean left side middle or rights side.  I have twins grandchildren. Girl is left handed, mathematician, boy right handed literature & arts. There you go. I do not think you can put labels on such things. 
And of course, and although I have no background in neuroscience or psychology, I have a theory:

High levels of dopamine get you prepped for action. You're in an anticipatory mode at this point. Where the dopamine goes, within its normal route to the cortex, is probably directly related to what you're thinking.

And people tend to get into routines where given a certain circumstance that they've experienced before, a certain set of reactions will take place because they've reacted that way before. The brained 'learned' to do something and is now more comfortable doing that than something else - it has created a path of least resistance.

But, people can change their minds. They can create new paths and such. There are strategies to assist with this like remembering "why" you're doing something to sustain motivation or get a boost of dopamine.

So once you get into that state of high dopamine. It seems plausable that a person would have the capability to shift their focus and use the dopamine or motivation for one thing over another.

But I bet that's a lot easier said than done. Maybe it requires some practice and understanding or a list of tips and so on.

That's just a theory though.
+Wynona Gibson Inherited is such a strong statement though. With most things, I always fall back on the idea that maybe some of it is inherited but probably not enough to predict future actions as people have a really flexible ability to learn new things.
+E Narcisse Yes & No.  we are given the ability to learn and hopefully we will. But again I live in Tennessee.  I am amazed at the no study musicians I have encountered. I on the other hand, had to do it the hard way and learn note by note.  Son-in-law- entire family just pickled up guitar and after fumbling some with it started playing.  This is not unusual in this vicinity. My son was never around his Grand dad and yet he had little mannerism that were identical.  I cannot explain.  I read science news.  I also study people.  I understand that some characteristics and certain traits can even skip a generation or two.  I am open minded on it.  I have a left-handed grandson that is a musician and artist.  Lot of mathematicians are right hand. Male_ math,   female literature.
   Right side of brain or left side.  Who truly knows for certain.  I just know I am a work-a-holic and enjoy working. I like to see things accomplished.  If you looked at my profile you will see i am pushing years. You do not want to know what a full enjoyable day I had.  Thanks for input. Interesting at best. Certainly not boring.  
+Wynona Gibson 
I took a look. Interesting bio you have in your profile there.

To add to the inherited vs learned topic, I wanted to mention that a lot of who we become can be attributed to the environments in which we developed our brains. I've read that this doesn't have to be true, since we can consciously counter it if we know what we're doing, but it's common and ... well it's easy.

Just today I've learned that we have "mirror neurons" to help us copy cat, or mirror, other people. Remember "birds of a feather flock together"? Yeah the mirror neurons are part of the science behind phrases like that. It can be a good thing or a bad thing. In your particular case it sounds like a good thing.

I'm sure everyone who has been under your wing has benefited from your hard work. If they were around you long enough I'm sure they picked up some of your traits.

Now you add that hard-work influence to a pinch of natural and inherited talent and you'll have a prescription for wild success.

At any rate, I think we agree that there are a lot of factors at play there.
+E Narcisse Also interesting name you have.  I can go along with the mirror  thing.  I have seen it in cliche's or groups that stick together.  Also husband & wife tend to thing alike as years together roll on-sometimes mannerisms are picked up unconsciously. I sometimes look in the mirror and see my mother!!!!!!!!! I know I could hear her when I disciplined my children.  Yes, I think that is a good one. 
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