Personally, I want to see Tali’s face, more out of curiosity than anything else. We know that Turians and Quarians are similar in that they are both dextro-protein species. In ME2, Grunt comments that Quarians are a bit tougher to break than the “soft” humans, Asari, and Salarians. This makes me think they are somewhere between Turians and Humans. Most Mass Effect fans have an expectation of what Tali looks like. Some are concerned about seeing Tali’s face because the design might not fit with what they had envisioned. I have to say I am not in that group. BioWare has done a fantastic job of meeting and exceeding every expectation I’ve had when it comes to Mass Effect. They know how well-loved Tali is so I trust them to not let us down. I also just think it makes sense to show her face after making her a love interest. If Male Shepard romanced Tali, he knows what she looks like… but we don’t. For me, that creates a disconnect between me and my avatar.
Check out this SWTOR video showing some gameplay in a group mission about a “militaristic Republic war hero” who has taken over Alderaan. Looks very cool! Saw a little of this in the closed-door at E3, but didn’t know the full context.