Don't care to jump into the middle of the some of the more heated discussions; however, despite the fact that it's been said to *Death* in this thread and elsewhere, I have to toss my hat in with, "A healthy mix of Both." If it's one thing BioWare has shown us, especially in regards to thier universes and art-direction, they always find ways to make something new/strange/alien look beautiful; also, they try to avoid too much stereotype. As such, *if* (and, let's face it, Casey at this point has teased that it's a "Big If") we see Ms. Vas Normandy's face, I doubt they'll make her look like the latest Hollywood/Canadian Film Industry Hottie/Model.
She'll be gorgeous, of that there can be little doubt (Mass Effect remains a Cinematic Sci-Fi Action Adventure Film in game form at it's core) but, given her anatomy and physical appearence, she'll be alien enough to seem, well, *Alien.* But not overly Alien, e.g. Turians, Krogans, Salarians, etc. I would say...more Drell then Asari though. So, that's what I think, come what may. Either way, this is BioWare. She won't (unless you're way too Anal Retentive/Have no life) disappoint.