This video demonstrates that when you click on a Player Voice set to hear the sample VO lines, and then quickly click another after you've "heard enough", the original VO will keep playing regardless of what you click on and is not interrupted by pressing any buttons.

Expected Result: When I click on another voice set, if a VO file is currently playing it should stop immediately and the sound file for the new voice set should start playing. 

 

Example from Baldur's Gate 2

 

The location of the VO that is played in the Character Creation seems to play from the position of the character in the game world. In the BB that is on the left of screen, so the sound only comes through the left channel.

 

Expected Result: VO should play from the middle/both channels.

that's because voices are recorded in mono using the left channel. It shouldn't matter where on screen they are, but the mix should be adjusted for stereo or 5.1 set ups.