As far as practicality, I guess whole numbers makes sense. They are clearly defined. But I always liked when GS did decimals back in the day. If a game got a 9.6 and another 9.4, you claim the higher score lol. It was funny for SW reasons. But it also made the reviews more unique. You can see by each review section how it scored. So in that sense, I prefer decimal.
How about you, SW? What review score system do you like most?