Originally, when I was still in Jerusalem before heading home with the bus, I thought about chopping off his Goku's haircut and have him with a standard Asian guys' haircut - kinda like what Yamcha had a few times in the franchise..
Then I thought about giving him a nasty/evil cowboys' mustache and "spearhead" beard...
Then I gave him a Ikki Tenryou (from "Medabots") haircut....
Then I changed it into more Samurai-like haircut...
Finally I decided to go with the more Ancient Sayians' barbaric hairdo (with a mild Flint the Time Detective hairdo's influence). Seems more dramatic and threatening, fitting a crimelord.