I know this post has already been up for a few days, but I thought I'd add my two cents anyway.
I definitely think that this is a very personal decision, that you ultimately have to feel good about. That being said, for me personally, I don't see anything wrong with it. I have found that this adds a little extra fun to our sex life, just as occasionally sleeping naked instead of rushing to get dressed after sex does. I still dress modestly on our date, the point for me isn't to show off my body to anyone, the point is that I feel sexier and we think it is fun. It enhances our sex life, which, let's face it, is a pretty big part of marriage and we have a lot of years of that ahead of us. If we don't change things up every now and then, we are more likely to have problems later on.
As a side note, I generally do this on dates that are specifically supposed to be romantic. I wouldn't forego garments for dinner and a movie or something of that sort, but a romantic picnic in the park, absolutely.
