When you have to play a character that seems to be a relatively decent person and seems to be like yourself, I think the trick in that kind of character, so that you don't become a cliche, is to find where their weaknesses are.
“You are the master of your environment. You've got your own head, your own mind. So once you figure out what you want for yourself, you have to create the proper environment to make sure you can live out all the things you want.”
“Simplicity is an acquired taste. Mankind, left free, instinctively complicates life.”