I don't understand how people are able to mathematically define a body of subjective text. The five star scale makes sense because it's just saying terrible, poor, average, good, fantastic. How do you even define that .25?
I've always been able to figure what number I want when I write a review on Steam, to me theres a difference between a 7.5 and 7.75, not a huge difference but I like having the flexability in numbering to match how I feel about a game, I don't think a 5 star system does that for me.
Like there are a lot of times were I don't think a game deserves 4 stars but deserves more than 3, it's all personal preference, I just think having a more open numbering system is easier to come up with a number to match the content of the review.