Is it because most big console games of the time were made by Japanese studios who only had access to like z-tier Canadian anime dub actors or the first three gaijins that walked past their offices?
Fallout 2 had fucking :warf-wtf: in it, not to mention numerous other examples of sci fi and horror convention regulars you'd see pop up in PC games of the era
Just study Deus Ex and you can certainly get the funny part down.