Great article on the Guild War 2 races
I did not pick Norn (and don't intend to after what I heard from that article) - but I do have a human male, and his voice sounds too old and wizened for my tastes, and it was interesting to read how the others sound/play in terms of backstory.
I rolled a sylvari mesmer and I vastly prefer the british accent male to the human males tone. Still intend to try out an asura as well, but don't want to spread myself too thin, when I make an engineer it will probably be one of them though. As for Char - just can't do it, don't want to be a large beastly race in game - personal psychological quirks going on there, nothing to see beyond it.