This structure was implemented to ensure that each graduate student has a strong general biological foundation on which to build as they conduct their thesis research. While the curriculum is challenging, most students successfully pass the preliminary exam required at the end of the first year.
Most faculty are extremely friendly and approachable.
It's clear that their main goal is to help you learn how to think about science, not simply memorize facts. They enjoy their work, and it shows in their attitude toward students. It's not as cold and snowy in the winter as some news stories would lead you to believe. When it does, it melts quickly. And, of course, there are the mountains to play in.