I'd prefer no voice, period! Two voices for each gender is just too few. They work if you're playing as a good natured human or (half-)elf character, but with any other race, they feel off. NWN 1 and 2 had a decent array of voice sets to choose from, and so did the previous two BG games, and Pillars of Eternity as a more recent example. It's personally a HUGE detriment when I can't reconcile my character with his or her voice