Please see this link: http://www.ewtn.com/expert/answers/head_coverings_in_church.htm
which answers the question about whether the current code of canon law requires women to wear a veil. The short answer is no. Of course, Scripture speaks to the subject as well, and this link addresses that as well.
I think it is perfectly fine as an expression of personal piety, devotion and love, as long as that is where you heart is. We aren’t being “more holy” though when we require or expect of ourselves or others more than what the Church requires.
That is an interesting article. Definitely a good defense as to why women generally don’t cover and are not obligated to.
I just feel like its an expression of humility in our culture of self-centeredness. And when in doubt, erring on the side of caution is always a good rule to follow.