My DH isn't the slightest bit romantic, despite my many hints. We've been together for 45 years, so it's unlikely he'll change now. I used to do the thing with little notes in the packed lunches but realised it was a waste of time.
The first year that we met, he gave me a pretty Christmas card in a box. However, he had addressed it to me formally by my full name, signed it with his full name (like I wouldn't know who he was!) and no message or kisses. I was cross with him at the time about something else, so I took the card and kicked it down the hall.
He did get the hint on that occasion, and always writes cards now with long loving messages and lots of kisses. However, he writes them all in capital letters and our DDs say that they look as if they have been written by a serial killer. I treasure them anyway!