Slowly, I was thinking you could surprise him with a virtual 180. For instance, if he values spontaneity and you are more of a planning person, do something spontaneous -- maybe something you did more of when you first met? Biking, hiking, sailing, ML?
Or a scotch tasting? Wine tasting? Buy surfboards? Roller-blade? Skateboard? Take a ride on a train? Have a picnic?
Think about what a surprise might be and spring it, kiddo!