Making a renegade character on Mass Effect

I actually recently bought Mass Effect 2 for my brother for his birthday.  However, I have not beaten Mass Effect 1 yet, but I have decided to make my guy go renegade.  As a nickname, I named him "OJ Simpson Shepard" as a cool villian name for him.  However, he will not be entirely evil and will have some good in him.
Will post updates on the game over time.  Currently, I just beat the Matriarch boss and getting ready to go to Feros (though I might do some side missions as well)