I LOVE the idea of having a wedding on Valentine's Day. I can understand how you would feel about the whole holiday thing, but like everyone else has been saying, it's a couples holiday, and I don't know about you, but I wouldn't mind attending a wedding on Valentine's Day. It makes you realize how much you really love the person you're with, and the fact that you're attending a reception too, means that you can party all night with your boyfriend/fiance(e) or spouse. I really like the idea of it.
Hope this has helped you out!
Marissa<3

[Edit: My fiance and I are getting married on our 2 year anniversary, of when we started dating, and our theme is lilies, and white, with a splash of yellow and pink to bring out the colors in the flowers. So, we're kind of having a seasonal wedding I guess you could call it. I think, if you're still kind of worried about the whole wedding on Valentine's Day thing, make the theme a little different from it. Like, for instance, don't do pink, red and white, do blue, green and yellow, or something. Understand what I'm trying to say?]