User blog comment:Yanxa/Under the suit.../@comment-1679409-20120218230112

I think a lot of it has to do with the fact that you interact far more with quarians than volus. In both games, you have a quarian squadmate. You can sleep with a quarian. You get to fight beside quarians. The volus are minor characters in comparison. So, you have a familiar character that you don't even know what they or even their entire species look like. For the same reason, I think, people want to see Master Chief's face in Halo.