Plus part of Valentine's appeal is a little tackiness!I do, but not to the extent of Christmas. I have a small white tree that I decorate with red heart lights and red garland. I use the same little tree for Halloween, St. Patrick's Day, Easter, and 4th of July.
I put Valentine cardboard cutouts in the windows. Some may think that's tacky, but they remind of being a kid as my mother used them for all the holidays. I decorate more for me now as my kids are grown as it makes me happy.