I'm not sure what variety of sweet potatoes you mainly use but I highly recommend Japanese and Korean varieties. They are starchier and sweeter than other similar potatoes. The best way to cook them is to poke holes in them, wrap them in foil, and bake them for up to an hour and a half. They come out perfect and are naturally honey flavored. With no seasonings or oil, people are wowed every time.
Also, I know this isn't technically eating sweet potatoes but sweet potato lattes are very good. I bake the potato(es) and blend the flesh with milk, sugar/honey, and cinnamon.