I don't mind Valentines day if the man and woman plan an evening out.
What makes me angry is how valentines day is thought as the end-all, be-all of a relationship.
For example, I knew a guy who was dating this girl for a number of years. This guy, based on what I know of him and their relationship, was a great boyfriend. He did EVERYTHING for his girlfriend. He was a class act.
Last year, for whatever reason, he forgot Valentines day. HOLY SHIT, it was WW 3 in their home. It didn't matter that hes been a consistent, good boyfriend for the last X amount of years. Nope! He missed that one day, and that's all that mattered.