One theme for Rumble Fish would be that life isn't fair
Throughout Rusty-James' life, he was just dealt all of the bad cars. His mother walked out on them, his dad drank constantly, and he was raised up in a gang area, with no choice but to fight
Another theme from Rumble Fish would be to do what's right for you, don't always follow in others footsteps
Steve used to follow Rusty-James around, and ended up making his dad mad and getting beaten. He cut Rusty off and got out of the house. Rusty-James tried to follow in his brothers footsteps, and wound up being nothing more than a bum doing odd jobs and going nowhere
A character trait of Rusty-James is he is dependent on others- he'll never admit that though
Whenever Rusty's brother, the Motorcycle Boy, was around, Rusty would try to follow him and be like him. Rusty was also afraid of being alone because of being ditched as a baby.
A character trait of Steve's would be that he is easy to push around
Even though it was generally obvious that Steve didn't want to go along with the things that Rusty James was doing, it was always easy to persuade him and get him to go. His dad abused his so he was also always jumpy and listened quick probably because he was scared
I actually did like the book, which was odd for me, because I'm normally pretty picky about what I read, and this isn't the normal type of book that I would sit down and read. Even so, I really enjoyed the book, and reading about all of the events that took place, and knowing what happened in Rusty-James's life.
If I were to change anything, I would fix the grammar and spelling of a bunch of things and make it better. I would also change the end, to where Rusty did go meet up with Steve again- so we could see what would happen then