In SR1, my character had short hair and was muscular-ish, and little chubby. He was a bit of a twig though, and looked young compared to a lot of the others. I saw him as maybe twenty. By the end of it however, he was less fat, a little thicker built, and had a thing for wearing business suits His hair had also increased in length.
In SR2, His skin got marginally darker(He had been burned)and his hair was short again. He still loved business suits, robbing people at the beginning to afford one from impressions. He was sleek and muscular in this one, with his hair eventually falling past his shoulders. By the end, he had also developed a thing for fedoras.
In SR3, he has dropped his Hispanic accent and put his hair in a pony tail, with a wisp of it dangling in front of his face occasionally. His hair has gotten a bit darker, and his eyes have become purple. His face is remarkably close to what it was. He still likes business suits though, and has left the fedora phase. And now, he paints his cars like they were from his gang.
And that's it.