Hi Megadump. It's a very nice style but it takes some time to do it.
For this artwork I used Illustrator, I wrote words related to the character, like honor, justice, freedom, etc. Then I duplicated them many times and I adjusted them to fit the figure. Finaly I Changed the colors.
Many people use a vector mask on a picture. It's easier in this way, but you do not get the same result. For now I don't know more tips to make it quickly