i hated hearing the sound of my voice to start with too. the first time i listened to a tape i just about died of embarrassment. the second run through was fairly cringe-worthy too. i used to see her weekly and i've leave with the tape. i'd listen to it about 4 times during the week... by the third or fourth run through i was able to think a bit more objectively about it, however.

i'd see where she misunderstood me (so i could clarify next time)
i'd see where she asked me something and i couldn't face it and i couldn't understand what she meant (so i would be able to come to understand what she was asking and answer next time).

i would tape over it the next time. didn't want to have a whole library to ruminate over... but i found it beneficial, yeah. and... i found her voice really soothing so i'd play the tape if i felt distressed. i could relive... that emotional connection.