I'm in the latter group, but it's only because I'm not in the former. See -- I actually love Valentine's Day. I love coming up with something to make the day special for my sweetie. (Ask atomicnumber51 about the year I bought Joe the whole mall.) Yes, we should show love all year, but what's wrong with having a designated day to go all out? It's not the most important thing in a relationship, but if anyone thinks it isn't nice, they're either lying or crazy.
So -- Happy Valentine's Day to everyone. Enjoy it in whatever way you see fit.