I don't buy much in terms of Big Gifts, but I do like buying him little treats when I see something that reminds me of him. Mostly food but I've picked up a few non-food items, too. I like setting up a romantic atmosphere more than anything and I'm generally spontaneous with the little gifts.
And merch is pretty fun too but I usually can't afford it (as much as I wish I could). It used to matter a lot more to me than it does at this moment, but I'd still like to have a few things.