Well I take Wellbutrin XL anti depressant for my bipolar. I started as the worst grade of Bipolar, I, and got better. Which judging from the online bipolar support forums, is unusual (to get better.)
Experiencing BP mostly as small grade unipolar depression, Wellbutrin sends me to the other side of ground level, so I am now permanently hypomanic as a result. And as a matter of fact, the old anti depressant which didn't do as much for me, Celexa, boosts serotonin, while Wellbutrin boosts dopamine and norapenephrine.
So I am living proof of a link between dopamine and hypomania (unless it is the norapenephrine or both.) Although only one case which as you know makes no study at all.
I am reading now the Hypomanic Edge book, which is very good (well I'm slanted since I have hypomania I suppose.) I have only read the intro and the first chapter on Christopher Columbus. But the author did mention in the intro I believe, that there is a correlation between number of immigrants and number of cases of bipolar. Japan and another Country mentioned, have both low bipolar rates and low immigration. While the highest, The US and Canada I believe are two of the top 3 for bipolar rates, have had high immigration.
Although - obviously some countries don't diagnose mental illnesses to the degree that the US and Canada do. But still there would appear to be a correlation.
Hypomania turns you into more of a Type A personality. It can lead you to spending sprees, which travel I would include as a spending spree, especially when it is travel plans made impulsively. Las Vegas is a good analogy for American Hypomania. It has all the elements of risk, hyper sexuality, questionable judgement ("sin city,"), grandiosity (over the top casinos,) creativity (entertainment/shows,) as well as the city having an overall entrepreneurial attitude.
Frank Sinatra in fact, exudes confidence which is another manic trait. Perhaps he was hypo - but I think if he was, he was able to keep a lid on it as he seemed to me to be calm as well as confident. Just look at some of his lyrics and you can see they could be considered hypo:
"Fly me to the moon
Let me play among the stars
Let me see what spring is like
On a-Jupiter and Mars
In other words, hold my hand
In other words, baby, kiss me"
The Las Vegas elements run rampant throughout all of the US. Just in milder form in most of the other cities.
The way my layman mind saw bipolar disorder was as if the mind is an engine, and full blown mania is over the red line in RPMs. Which of course eventually breaks the engine down, resulting in ensuing depression. In fact I think they know that full blown mania kills brain cells. And perhaps depression does as well, I'm not sure. But if you think of your own functioning, you know that there is an ideal spot in mood that allows you to function but not over function nor under function. Mania is over functioning, depression under functioning. And obviously being a little bit over functioning can seem like a good thing, and probably is a good thing, if the disadvantages can be controlled. (Which I am attempting to control using natural methods such as meditation/prayer, excercise, and what not.)
Unipolar hypomania does not seem to kill brain cells judging from my experience anyways. I don't get any downward swings. Only time will tell if I get worse or stay the same though. Lithium makes me sleepy so at this point I am not taking it, as I am more productive and feel younger and more alive with only the Wellbutrin XL, which I call either my "wonder drug" or my "fountain of youth."