I have really got back into sweet potato.
I use to eat it a lot and as with anything you eat too much of, got kind of bored of it. Recently I have got back into it. My preference is simple to cut into slices and roast in the oven with a splash of olive oil. They then have a natural sweetness which really adds to a meal.
I do also quite like them mashed, but roasted slices will always be my first choice.