Holland is more then Amsterdam
Most of the tourists go to the major dutch cities. I think that I'll do the same when I was a tourist. But when you look further then the populair areas you can see much more. For example rent a bike in Holland and go biking. Because everything is flat, your only opponent is the wind. The neigborhood of Bergen is very attractive for people who love the sea (and beach), the countryside, the dunes and some cities (Alkmaar 3 km, Amsterdam 30 km = 30 min by car). And you also can easily jump to the dutch islands, Texel (60 minutes including boat) : visit in March and you can see thousands of lambs.
So, visit Bergen and his neigborhood!