As long as you don't sound like a complete [censored] like on Fallout New Vegas and no matter what race you pick you sound exactly the same.
I personally thought the male nord voice is perfect... not many people even vikings have voices as deep as people like for some reason..
It has to do with secondary sixual characteristics and all that.
There's also psychological links to things, including an article I read in which they tested women's reactions and memory linked to voices.
Women rated deeper voices more attractive and they had better recall of what was said, compared to other voices.
So, y'know, whatever. People just being obsessed about being as attractive as possible, nothing new. Admittedly, however, a thu'um would sound really cool in a deep voice, just kinda for that extra "boom".