Hi @Ian_Zhang, it’s not that hard to make your character stand out though!
Try:
- different poses, one where your character and body aren’t in their default position
- moving your character sideways, up or down so that the head isn’t in the middle
- moving the chin, mouth and neck for a more life-like appearance
Those three steps already make your portrait a lot less like default portraits.
Aside from that you can also change clothes, hair, light and other items to make your character unique. 
Also look in this thread for more inspiration: EVE portraits - share tricks, and share yours!