Our tradition is that my husband gets me flowers and I make him a lobster dinner. He loves seafood and I love flowers, so we are both happy.
I get that many people, especially former dubss, are not into holidays, but it's not reall hard, flowers and/or chocolate and/or dinner out. You usually see lots of men at theh grocery store flower kiosk on Valentine's day buying flowers on their way home from work, it's not like the had to put a lot of thought into it.