I think we should be able to hear it when creating a character. I created a character just to see how I'd look after the fantasia potion, and her voice was just fine with the emotes you can play while creating your character. I could've stopped there but I decided to really create it, and do the first quests. Soon enough I get to go outside the city and fight small creatures. I had taken the pugilist class. To my horror, her voice in combat was HORRIFYING. So I guess the only way I have to check that is make a new character with each voice...And with fantasias coming soon, it'd be nice to just be able to hear it while creating your character and not have bad surprises once you've changed.