Oh no, I spend a ridiculous amount of time on my sims in CAS and pay close attention to everything, including their voice and its pitch. I actually wish we had more voices to choice from, as it's a nice touch for making them more unique. I also love how different speaking voices/pitches creates different singing voices. The voice has to suit the sim for me, so for example my English grand master vampire has the 'warm' voice because he's supposed to be very well spoken, mature and educated, while another of my sims is a histrionic goofball so he has the 'brash' voice. I sometimes have a particular background or accent in mind for a character so I try to pick the closest to that and adjust the pitch accordingly. I don't think there's a voice I avoid completely, but I can understand how certain voices or pitches could be annoying, particularly the 'melodic' voice which is my least favourite for females. You're right actually, there's nothing melodic about it! I definitely use 'lilted' more often. I also prefer the 'warm' voice for men over the 'clear' which can sound a bit whiny and immature to me.