That certainly was one of the game's most genius touches. It really helped to put you into the mindset of a xenomorph as you followed it from the moment of birth.
This moment actually won several awards in various game magazines as one of the year's best gaming moments. It doesn't take much to see why.
I will have to change my previous statement in 1999 being my favorite. I really cannot pick AvP1999 or AvP2 as a favorite. They are both like a single entity that encompasses everything that the AvP franchise should be.