Training your voice to sound "operatic" is not the main purpose of voice training. And for those who say they don't like opera, how many of you have heard a live opera performance, how many know a classical singer and have sat in a room and talked about singing with them and listened to their singing? This is a reverse snobbery, and I wish people would just get over it. There are real ways that you can ruin your vocal cords forever, create permanent nodules, lose your range, etc, by not knowing some of the basic techniques that the opera singers have developed over time. On the other hand, there are styles of singing - look at the Balkans - that are so different from ballad type folk music that Americans are used to that to talk about 'a good voice' in such general terms does not make sense. I state again, the good voice is the one that is right for the type of song being sung.