The women I draw all have the same sort of personality. I can't draw gentle girls; I only know how to draw ones who are strong-willed.
I'm personally not terribly interested in designing wholesome characters, so I don't have many variations to offer.
The setting of 'Dragon Ball' has a sort of Chinese feel to it, but it's not necessarily limited to China. For the time period as well, exactly when it takes place is indeterminate.
If you're doing gags, I think it's important to have characters who are as strong-willed and impactful as possible.
When I look at it, I don't really like people, and socializing is really awful. Outside of my family, friends, and those connected to my job, I don't think I actively want to meet anyone. I've always lived in the country, after all.
I wanted to change up the tempo and setting of my comics in the sense of giving them some variety, for one thing. So where, for 'Slump,' the art was very America-esque, in the case of 'Dragon Ball,' I made it as Chinese as could be.