You've discovered a phenomena we've come across in the office called "telephone hot." We used to work with this one distributor lady who had a GREAT voice on the phone, and was always extremely helpful, quick, and very capable. Her voice just had this pleasing ring to it, it made you happy, calmed you down even if you were having a bad day. Everyone liked her. Some of us even started joking about "I wonder what she looks like?" But that is dangerous. You can never know what she looks like. It ruins the fantasy if you ever see her, because 9 times out of 10 she will not live up to whatever your imagination has created. Most of the time it isn't even close.
I liked listening to Michele Norris, I imagined her as a reasonably attractive late 30's white housewife, someone who is not drop dead gorgeous, but has aged well, with classic and conservative good features. Thanks for ruining my fantasy.