I just noticed that on Stack Overflow there have been 40,527 Notable Question (Silver) badges awarded, but only 25,105 Nice Question (Bronze) badges awarded. This means that there are at least 15,000 questions that have been viewed 2,500 times without getting ten upvotes and possibly many more (if the two sets are completely disjoint, though I doubt that's the case).
My understanding is that silver badges should be much harder to earn than bronze badges, but in this case it seems like the opposite is true and that it's easier to get 2,500 views than 10 upvotes. This probably is because the older a question is, the more likely it is to get a lot of views.
Is the current system of making Notable Question silver but Nice Question bronze really fair? I don't think it's horribly broken or anything, but it does seem strange that we reward questions with many views more highly than questions that the community has decided are valuable and useful.