Daystar Clarion said:
What amazes me about the whole 'what do Quarians look like' situation, is that you'd fucking think there'd be photos lying around, since, you know, they do occassionally take their suits off.
We should know what Qurians look like in general, but what Tali looks like? I'm not sure...
One of the Asari characters (I think it's the one behind the bar on Illium) said something about "...back when people could still remember what the Quarians looked like," in reference to something completely different. It was a throw away line but it gave the impression that it was such a long time ago that it's just been accepted that Quarians live in those suits and no one remembers it otherwise.
Besides, when you ramance Tali, she tells Shepard that to share the same environment with another is a gesture of extreme trust and respect. I expect that within the Quarian culture, to reveal their appearance has simply become something they just don't do, considering the implications it would entail on a social level.
Personally, I'm not fussed about seeing Tali's face. Part of the reason I like her so much is the mystery and complexity of the character and her race's culture and the suit is all part of that. Besides, there's just no way of doing the reveal without it being a "I want to show you my face before I die" kind of scene, just like someone already said.