Sometimes when I get an obsession is comes out of left field and hits hard. This is the case with my current love affair with antique quilts. I've always liked them, and have a couple of nice examples, but all of a sudden a few days ago I realized I really really want to collect them, in a big way. First, they're very useful- you never know when you'll need an extra blanket. Secondly, they're gorgeous and each one is unique. Finally, how can you deny the amazing craftsmanship and hours upon…