In APB you can customize many aspects of your character. Not only can you pick a piece of clothing, but you can edit the: sleeve size, button color, decals applied to them, and much more. You can also customize your character's body and face attributes including tattoos, hair type and color, and breast size. This can even be done after character creation for a fee.
You can also customize your character using character upgrades. Each character has a maximum of 4 available slots to apply an upgrade. Your character comes with the first, and the second and third are awarded at reaching level 20 in an organization.
The 4th is currently not unlockable