Are you honestly complaining about having Liam Neeson as your father?
And furthermore, are you asking Bethesda to have a unique voice actor for all of it's hundreds of NPCs? While it may be possible with the more prominent characters in GTA, it is unfeasible in FO3, especially considering that people who do not play the game day in, day out would have a very difficult time recognizing that a voice is recycled between Arefu and Paradise Falls.
While the guards all having the same voice is immersion breaking, so is hearing the voice of a pedestrian I swore I run down five minutes ago.