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It's true, not all grad students are rich. Many are poor as church mice, as the saying goes. Some of them are even pretty cool to be around. But, and here I speak from experience, as I am swimming in an ocean of grad students, many are, by and large, among the most obnoxious, self-important, arrogant, self-regarding, precious, special, selfish little pricks on the planet. Rich or poor doesn't make much difference.