Player's Handbook (DC Universe Supplement)
From D&D Wiki
Advice on Character Creation
The setting is only what you make it...and what it makes of you. Your character will be your connecting point into a world of amazement and adventure. Take a few steps during character creation to ensure that you'll be living your DC life to the max.
When creating your characters, you should understand what type of characters that the Dungeon Master wants in his game. This will help the DM get the genre and feel that he wants to present in the game. You will also create a character appropriate to the game before you. This should be your first step before deciding anything about your character.
D20 Modern is an action oriented game. Your character will face a myriad of dangers, and as such must be willing to face those dangers. It is up to you to find that motivation for your character. Not all said dangers happen in battle, and keep this in mind when building your soon-to-be-hero.
Focus on the Party
The DC Universe is extremely large for a party of adventurers to go trouncing through, and even larger for just one person. Remember that your success can only be calculated in your party's overall success. Help others, help yourself, form bonds.
Some back story is good for the character. Too much back story leaves your character nowhere to grow. The best back story is one that helps define your character, but still leaves you room to innovate about your character. Read up (or ask your Dungeon Master) about the Sons of Anarchy setting so you can have some grasp of where you character grew up and the environment he was nurtured in.